Warning! This one is an angst, and is about (y/n) taking an illegal drug that is a fat burner. I had to do plenty of research for this oneshot, but the fat burning drug (y/n) gets is called Dinitrophenol. It's illegal and has many, many side effects. If this kind of topic is not for you then please don't read, I will completely understand. I don't want to upset any of my lovely readers! 

It also ended up being longer then expected so my apologies for that, when I started I just couldn't stop.

Quirk: Forcefield

 It was almost midnight as I sat staring at my computer screen in my dorm room of Heights Alliance. For the past few weeks I had been wondering whether to purchase this illegal fat eating drug or not, as recently my self consciousness of my weight had unquestionably increased and I don't know why. It wasn't just my weight however, it was everything about me. I wasn't as sexy as Momo, as cool as Kyoka, as fun as Mina, as cute as Ochaco, as sweet as Tsuyu or as interesting as Hagakure.

The particular fat eating drug I was looking at was called Dinitrophenol, and it quickened metabolism as soon as ingested, however the website listed three side effects: headaches, fever and restlessness. 'That's not too bad,' I thought to myself. I knew however that if my boyfriend, Shoto Todoroki, found out I was taking the drugs he would freak out. I would have to keep them well hidden from him.

I finally caved and ordered some, the website then saying that I had to go to a specific location at 22:00 on this coming Friday to pick them up and would have to pay with cash. When it came to, I snuck out of Heights Alliance via my balcony, using my forcefield as steps down to the ground. I stayed alert as I headed to the specific location, the cash in my pocket. I waited in the alleyway, my heart beating incredibly fast as a man came out of a nearby door, carrying a bottle in his hand.

"The cash first," his deep and intimidating voice said.

"R-right," I muttered, pulling it out from the pocket and handing it over. Once he had finished counting it, he threw the bottle towards me. A second later, he vanished. I pocketed the drug and started walking back to the dorms, climbing into my room the same way I exited. Slowly I opened the pharmaceutical bottle and tipped out one of the oval shaped drugs. Breathing in deeply, I put it in my mouth and swallowed it with some water.

- Timeskip -

I had been taking the drug for about three weeks now, one everyday as advised on the bottle. I saw a difference in my body almost straight away, creating a boost in my confidence however some of the side effects I was experiencing were more severe then stated on the website. I felt nauseous almost every day, and I found training increasingly difficult as I would get out of breath incredibly quickly and my heart rate would excel to abnormal rates. The headaches were more like migraines and I was throwing up every couple of days. Despite all of this, I knew that if I wanted to remain skinny I had to keep taking the tablets.

"(y/n), are you alright?" Shoto asked me on the way to class one morning. I was stumbling around from the increasing dizziness I was feeling, but I tried my best to play it off cool.

"Y-yeah I'm fine, why?" I said.

"You just seem a little ill," he said, feeling my forehead but I brushed his hand away.

"Don't worry, I'm okay," I tried to say in my most convincing voice. I wasn't sure whether it worked or not; he didn't look satisfied with my answer but he didn't press on it. Throughout the ten minutes of homeroom, my dehydration (another side effect from the drug) caused me to drink my entire bottle of water. After homeroom we had a five minute gap to get to English, and during that time I had to fill up my water bottle.

"Someone's thirsty," Shoto said as he stood by me whilst I filled up at the water fountain. I simply laughed it off, chugging half the water once I had filled my bottle. Shoto frowned at me, a mix of curiosity and concern on his face. "C'mon (y/n), we'll be late for English," he said as I refilled my bottle again.

"R-right, I'm right behind you," I said as we walked towards the classroom. Throughout this lesson however, the nausea hit, and I could feel myself about to throw up. I raised my hand quickly, catching Present Mic's attention. "C-can I go to the bathroom sir?" I asked quickly and he nodded. Once I was out of the classroom I raced to the nearest toilets, reaching it just in time. Once I had finished, I wiped my mouth and sat on the floor with my head against the cubicle door. Is this worth it?' I asked myself but I looked down at my body and saw how much skinnier I had become. 'Yeah... probably...' The rest of the day went in a similar fashion; I had a small lunch but had to run to the bathroom to throw that up as well. My dizziness was increasing and I was trying desperately to cover it.

"Okay (y/n), something is seriously wrong. For the last fortnight you've been acting... strange. Are you ill? If you're ill you have to take some time off of school," Shoto said sternly once we reached his room.

"Shoto I'm fine, I just feel a little dizzy, but I didn't sleep well last night so that's probably why," I lied.

"Come here," he said, opening up his arms and holding onto me tightly. His warm side made me feel comforted and I loved cuddling up against it. "Sleep in here tonight, I want to make sure you're feeling okay for tomorrow."

"Okay Shoto, thank you," I mumbled. That night he helped me with my homework, still carefully watching me like the protective boyfriend he was. I loved the caring side to him as I absolutely adored seeing his small smiles. Tiredness hit me sooner then expected however, so I decided to changed into some of his lounging clothes. As I did he glanced at me with furrowed eyebrows. "I-is something wrong?"

"You're a lot... slimmer then you used to be... are you eating?" He asked, concern lacing his voice.

"Yes, I am," I replied simply. He nodded slightly before opening his arms, hinting at me to sit beside him so we could lay down and fall asleep together, something I happily did.

When I woke up the next day I realised I was sweating buckets, and it wasn't because of Shoto's warm side. I had found out that that was yet another side effect, so before Shoto woke up I jumped into the shower in his ensuite to try and get ride of all the sweat. I looked down at my body and realised the drug was working really well. Some of the self consciousness I was feeling disappeared, thinking that surely now I'd be considered as one of the pretty ones. "(y/n), you alright?" He knocked at the door.

"Y-yeah I'm fine, just thought I'd freshen up before school!" I called back.

"You're aware it's 05:30," he said through the door.

"I-is it? Sorry, I didn't realise, I just woke up so I thought I'd freshen up too," I said, stopping the water. I almost fell over as I stepped out of the shower, but I caught the sink just in time. I wrapped the towel around me just in time for Shoto to open the door.

"(y/n) we've been together for months so I can tell when something is wrong. Please tell me whats up," he whispered, stepping into the bathroom and wrapping his arms around me.

"I'm fine, I promise Shoto," I whispered, looking into his heterochromatic eyes. He seemed unconvinced, so I went on my tip toes and kissed him passionately on his lips. He cupped my cheeks sweetly as we moved against each other, before pulling apart.

"You feel warm," he said, feeling my forehead.

"I have just been in the shower," I pointed out and he sighed. "Go back to sleep Shoto, you can get another couple hours sleep."

"I'm not gonna sleep without you. Lets get ready and go for a walk before school," he suggested and I nodded. "Hopefully that'll clear your dizziness."

"O-oh, yeah, maybe," I mumbled under my breath, averting my eyes. Throughout our early morning stroll I tried my best to walk normally, but I was becoming short of breath already. I subtly felt my heart beat and it had excelled to abnormal speeds. "Er, Shoto, shall we sit down for a moment?" I suggested casually and he looked over to me but nodded.

Sitting down he held on tightly to my hand as I rested my head on his shoulder, trying to slow my heart rate down as we looked on at our famous school. "I probably don't say this enough, but I love you (y/n)," he suddenly said.

'Oh no,' I thought. 'This is not good for my heartbeat.'

"I love you too Shoto," I whispered, looking up at my handsome boyfriend. It had reached school time as we saw people leaving their dorms and heading towards the school, so we joined the crowd, hand in hand.

During first period, modern hero art history, we were told that our homework was going to be creating a presentation on a now retired hero. As we were to do this project in pairs, I went with my best friend Kyoka as Shoto had partnered with Midoriya.

The rest of the day went on as academically normal, however I had to excuse myself to go to the toilets and threw up twice. It was also a day that decided to give me a splitting headache as well as an increasing heart rate. My nausea was worse then it had ever been before, and I wasn't happy that we had hero training last. For this lesson we were also put into pairs, however they were already chosen for us, and to heighten my self consciousness even more, Shoto was paired with Momo.

I was paired with Ojiro, and we were put against Shoto and Momo in a battle. My breathing was increasing faster then it should do, which was probably due to the fact I took two pills this morning when I quickly left Shoto to grab my school bag from my room. Aizawa started the battle as the class watched from the side lines.

I first created a forcefield to cover both Ojiro and I to protect us from Shoto's ice blast. "Ojiro, go up these," I tried to shout out but it came out slurred as I stumbled around. I still managed to create forcefield discs acting as steps. He climbed them and jumped off of them, swirling and aiming his tail for Shoto who easily dodged it. Ojiro thankfully managed to dodge Shoto's ice blast however, the the pitch was left wide open.

Shoto turned towards Momo, and as soon as he did Momo took off the top of her hero costume, leaving her torso naked for Shoto to see. He immediately turned away, blushing bright red, and anger filled me which didn't help with the state I was in. Before she could do anything I sent a forcefield her way, trapping her in a ball. She punched at it but as it was fuelled by my anger, she couldn't get out. The dizziness soon overtook my body however, and I stumbled, my eyes rolling back as I almost fell to the ground. Thankfully Ojiro caught me, but seconds later he was trapped in ice.

I too was caught up in it as Ojiro was holding onto me, and Aizawa announced Shoto and Momo the winners. Shoto ran over as soon as he could and melted the ice, holding onto me himself. "(y/n)? (y/n)!"

"I-I'm okay, I must've overused my quirk," I tried to laugh off.

"You've never feinted from using your quirk before," Shoto said sternly.

"Well... Momo just angered me, that's probably why," I half-lied.

"Does she need to go to Recovery Girl?" Aizawa asked.

"No sir, I'm okay," I said quickly, knowing that Recovery Girl would be able to tell in an instant that I had been taking the drug. I managed to stand up without loosing my balance, but the headache I had was blurring my vision.

"No you're not-," Shoto started but I interrupted him.

"Yes I am Shoto," I said defiantly, before concentrating hard on walking back to the benches the rest of the class were sitting on. Aizawa carried on with the class as normal as I sat down on the bench, trying desperately to ignore the pain I was feeling. Kyoka too asked if I was okay to which I nodded and assured her I was.

That evening Kyoka and I decided that it was best to get a start on the paired project in order to make it the best it could be. I was still feeling agitated and self conscious at what Momo had done earlier that day. Did she purposefully wait until Shoto was looking at her? Did he see anything? If he did, did he prefer it?

Just before Kyoka came over to my room, I took two of the pills in my ensuite due to the stress and unease I was experiencing. I heard a knock on my door, so quickly closed the lid of the pills but, without realising, I left them on my bathroom cabinet instead of putting them in their hiding place. "Hey (y/n), you alright?" She asked when I opened the door, trying to be casual but I could tell there was serious concern laced in her voice.

"Yes Kyoka, I'm okay. Shall we get started on this project?" I asked and she nodded. Together we sat on the floor, scouring the internet to find an ex pro hero we could study. Kyoka suggested Crimson Riot, but I was more then certain that Kirishima and Bakugou would end up studying him, so we looked for someone else. I was trying my best to ignore my nausea but it was incredibly difficult, and I ended up chugging a whole bottle of water due to my dehydration.

"You know Todoroki's been really concerned about you lately, he's even been asking me if I knew of anything bothering you," Kyoka muttered.

"He's just being over protective," I said, rubbing my forehead to get rid of the sweat. I got up to open the window, to make it look like I was sweating from heat.

"Hm... well, I'm going to the bathroom," she said and I hummed in response, but as soon as the ensuite door shut I remembered I hadn't put the tablets away.

"Kyoka!" I shouted, almost tripping up as I ran to the door. I started banging on it dramatically. "Kyoka, open up!"

After a minute or two she finally did, the bottle in one hand and her phone in the other. "(y/n) what the hell are these?" She demanded.

"E-er... it's medication I have to take..." I mumbled awkwardly.

"Oh really? So it's not this illegal fat eating drug?" She hissed, lifting up her phone to see the fact she'd researched the drug. "Why the hell are you taking these?"

"I-I wanted to l-look better-,"

"Is this why you've been so off over the past month?" She asked loudly and I nodded timidly, the stress levels rising in me dramatically. "You have to stop taking these (y/n)! They could cause serious harm!"

"I wanted to be skinnier, maybe then Shoto would love me more... you can't tell him Kyoka!" I pleaded.

"You have to stop taking them!"

"I can't stop!"

She suddenly threw the bottle on the floor and stormed out of my room, leaving me hyperventilating, sweat dripping from my brow at an alarming rate. Before I could stop myself I picked up the bottle of pills and stumbled into the bathroom, my nausea growing. Stumbling everywhere, I managed to fill a glass of water and pour out the bottle of the drugs. There were eleven tablets left, and one by one, trying not to spill the water, I swallowed them. The dizziness started to consume me, and as I fell I knocked over the bottle, smashed the glass and let go of the last pill before darkness consumed me.

- Todoroki's POV -

Midoriya and I were sitting on the sofas in the common room, telling ourselves we were going to start on the paired project but all we were doing was talking about the newest heroes on the scene. That was until Jirou burst through the doors from the stairwell, looking very out of breath. "Todoroki!" She shouted, running up towards us. "(y/n)- drugs- taking- ... cramp!" She was breathing incredibly fast before she hunched over and clutched onto her side. I had already heard everything I needed too however.

Quicker then lightening I left the common room and bounded up the stairs towards her floor. I ran down the corridor and burst through her dorm room, it being empty until I looked to my right. I saw the ensuite door open and there, slumped against the shower was (y/n). I immediately panicked as I ran in and bent down to hold onto her. She was still breathing. She was laying in what looked like a pool of her own vomit, with some of it dribbling from her mouth as well. She was warm, incredibly warm, and as I tested her pulse it was beating erratically.

"Todoroki- oh no, (l/n)!" Midoriya suddenly said, standing at the door.

"Get Aizawa, NOW!" I shouted. "It's okay (y/n), you're going to be fine, you'll be fine," I said, trying to comfort myself as well as I clung onto her. "Keep breathing, keep breathing."

I realised she had cuts on her arms and saw there were broken shards of glass on the floor. There was also a pharmaceutical bottle, and I picked it up, reading the label. I was unsure what Dinitrophenol was, but I could tell it wasn't good and I had no idea why she was taking it. She started moving in my arms and my attention went from the bottle back to her. "(y/n)! (y/n), can you hear me?" I pleaded. She tried to open her eyes but they simply rolled back. She coughed and more vomit dribbled down her chin. I grabbed a towel and wiped it away just as Aizawa came in.

The next few hours were some of the most stressful of my life. Aizawa immediately phoned Recovery Girl and told me to step away from (y/n) whilst he checked her over. I reluctantly did so as Aizawa did everything I had just done: checked her breathing, her pulse and asked if she could hear us. Recovery Girl thankfully came quickly, and together they took (y/n) to the on sight hospital room. I went with them, but Aizawa told the others to stay in the dorms.

I was clutching onto (y/n)'s hand all the way there, desperately hoping she was going to be okay. Panic and worry was spreading through my body like a wildfire as Aizawa placed her down on one of the hospital beds as Recovery Girl started performing tests. Aizawa gave her the drug bottle that was in (y/n)'s ensuite, and she told us that Dinitrophenol was a dangerous and illegal fat eating drug. "What? Why would (y/n) take those?" I asked but they both seemed clueless. I stared down at my unconscious girlfriend, holding onto her hand tightly.

"Can you do anything?" Aizawa asked Recovery Girl.

"As it's not a physical injury I can't heal with my quirk, however I do know a lot about the medical field, so I'll be able to heal her," she said, nodding. I breathed a huge sigh of relief.

"C'mon Todoroki, we need to leave Recovery Girl to it-,"

"No, I am not leaving (y/n)'s side," I said strongly.

"Todoroki-,"

"No!" It was the first time I had shouted at a teacher, but Aizawa looked at me in an understanding way.

"It's alright Eraserhead, he can stay," Recovery Girl said and Aizawa nodded, then taking his leave. The night felt incredibly long as Recovery Girl hooked (y/n) up to a life support machine, worrying me even more.

"Recovery Girl... what does the drug do?" I mumbled, not taking my eyes off of (y/n).

"I'm not sure you want to know sweetie," she mumbled, checking the machine. I glared up at her, my look demanding her to tell me. She sighed. "It's a fat eating drug that quickens metabolism to an unhealthy rate. It's illegal because there are many side effects including dizziness, intense vomiting and migraines. It seems as though (y/n) has over-dosed. I'm afraid to say that in some cases this drug can lead to comas or... or even death," she whispered the last part but I heard, loud and clear.

I broke down there and then, clutching onto my girlfriends hand as I cried. I felt Recovery Girls pitiful stares but ignored them as I desperately pleaded for her to make it out of this alive. The night was long and I tried desperately to remain awake throughout it all, but I ended up falling asleep with my head rested on the mattress of the hospital bed, my hand still in hers.

- (y/n)'s POV -

Slowly I fluttered my eyes open; the light was blinding. I could barely make out my surroundings, but I felt something warm in my hand. I tried to move but I had no energy, and the pounding in my head was not letting me. I could tell there was movement in the room but everything was all fuzzy. "(y/n)? (y/n) can you hear me?" A voice I recognised and loved asked me, even if it was a little mumbled. I tried to say something in return, but it only came out as slurs.

As I adjusted to what was around me, I saw that I was in a hospital bed, with Shoto at my side clinging onto my hand. He had red puffy eyes and was smiling brighter then I had seen him smile before. There was an annoying beeping sound and it took me a moment to realise I was hooked up to a life support machine. Over the end of my bed I just about saw Recovery Girl approaching, clipboard in hand. "(y/n), how are you feeling?"

"C-confused," I slurred. "Hurts-," I tried to gesture my head but my limbs were too weak.

"It's alright, you're safe and recovering," she assured me.

"Recovering?" I mumbled. She pulled from her pocket a bottle and placed it on the bedside table. As soon as I saw it everything came flooding back to me - the purchase of the drug, the horrible side effects and the overdose. "I-I-,"

"It's alright (y/n), you still need to recover. I'm afraid you'll be experiencing the side effects of these drugs for at least a week, but as you excrete the drug they'll slowly clear. You'll need to drink plenty of water and eat healthily. I need to keep you hear for at least a couple of nights to monitor you before I can even think about discharging you," she informed me and I nodded, sadness overcoming me. She looked from Shoto to me then back again, before leaving the room to give us some time alone. I had fully adjusted but still felt weak in my body.

"Why?" Shoto mumbled quietly, the smile from his face had gone. I didn't know how to answer. "Why would you take such horrible drugs?" He asked a little louder.

"I-I don't know," I mumbled, tears coming to my eyes.

"Did you really think you needed to take fat burning drugs?" He asked, a little bit of weakness in his voice.

"I-I just wanted to be pretty," I whispered, refusing to look at him.

"What? (y/n), you are pretty, in fact you're gorgeous-,"

"See, the drug was working-,"

"No (y/n), you've always been gorgeous! I fell so hard for you because I love your normal self! Before you started taking the drugs, I mean. I've hated seeing you so ill for the past month, it broke my heart, and now I know why you've been feeling this way. Please (y/n), I'm begging you to not take these drugs, you were perfect the way you were, you don't need drugs to be beautiful," he pleaded, sitting on the side of my bed and cupping my cheek. Tears fell from my eyes, wetting his hands.

"But-,"

"No buts. Please (y/n), these drugs could cause serious harm to you, I can't loose you. I'm begging you, you do not need drugs to be the most perfect girl in the world," he whispered, looking into my eyes. I started crying fully, muttering many apologies and to each one Shoto whispered 'It's alright.' "Do you promise not to take anymore?"

"I promise, Shoto, I promise," I whispered as he pulled me in to a tight hug. Throughout the week Shoto barely left my side and was even excused from some lessons in order to check up on me. Every meal I had I ended up throwing up again, and there were moments when the dizziness and migraines became too much and I'd almost pass out. I was questioned about where I attained the illegal drug, and thankfully I was left with just a warning, the police claiming that they didn't want to ruin the chances of a perfectly good future hero given the current climate.

Slowly however during the week I managed to recover, and on day six Recovery Girl finally discharged me. Shoto helped me back to Heights Alliance and as soon as we were there, people jumped up and was asking me repeatedly if I was okay. Once everyone had calmed down Shoto took me to his room where we laid on his futon and cuddled tightly. "I'm so happy you've overcome this (y/n)," he whispered, kissing my head.

"Me too. I couldn't of done it without you," I mumbled, holding onto him tighter.

"I'm here for you, my perfect girl. Until the very end."