Out of all times.

Out of all times for Izuku to suddenly lose his quirk, it just had to be during a villain attack. The flames of the forest grew higher as villains overtook the training camp. It was just Izuku's luck that the league managed to snag a quirk swapping villain. 

And it also just so happened that he and Momo were hit by said quirk. 

Izuku knew One For All couldn't be stolen, but apparently "swapped" somehow fell out of that category.

Momo rubbed her temples as she got on her knees. She felt funny. Yet... Powerful. She raised her head to look over to Izuku on the ground near her. "Izuku! Are you alright!?" Momo helped him up and cradled his head. She cupped his cheeks and looked over his injuries. She was happy to have found none. 

The act would seem intimate to most, and to Izuku it definitely would have been far out of his comfort zone a couple of months ago. But, the two had become much closer since the beginning of the school year. 

While Izuku wasn't the Class President for long, the short time he was the President he had talked to Momo. At first, it was simply to talk about the things they could do as the class representatives. But, it eventually turned into actual conversation. 

The two found common interests and became fascinated with one another. Izuku was flabbergasted by Momo's genius and beauty and Momo was endeared by Izuku's shyness and heroic nature (and obsession). 

Even after Izuku gave the position to Iida, the two continued their friendship and it grew stronger by the day. Soon she was Izuku's closest friend, and vice versa. And their friendship began to evolve into something more, even if neither would admit it yet.  "Y-Yeah, I'm okay. But, uh…" Izuku lifted his hand to see the familiar blue glow of Momo's creation quirk appear on his palms.

 "We have a problem."

…

"Where are we going?"

"This is where Kota's secret hideout is! He has to be here!" The duo ran through the forest towards the child's hideout. They had made it back to Mandalay, but she asked Izuku to find Kota and keep him safe. And there was no way Momo would let him go off by himself.

She also didn't want Izuku to stop holding her hand. So, she was along for the ride no matter what.

They emerged from the treeline and arrived at the cliffside. Kota was face to face with a giant, masculine man. Izuku's eyes widened. Being a hero nerd also involved knowing villains. And this one was no small fry.

"...Muscular." The villain raised his fist to slam it down onto Kota. "NO!" Izuku jumped forward, but immediately tumbled to the ground. Oh, right. He didn't have One For All anymore. "KOTA GET OUT OF THE WA-!"

*WHOOSH*

A strong gust of wind erupted next to Izuku, and Momo was suddenly gone. Muscular's fist connected with nothing but the ground. "What the-?"

All eyes turned to look behind the villain to see Momo holding Kota, and her right leg freshly broken. She seethed in pain. This was what Izuku felt all the time!?

Muscular chuckled, "Well who do we have here? Another little hero trying to help."

"Leave them alone!" 

The blonde whipped around to Izuku. "Two of them!? Now this really is my lucky day! Now I get to kill all three of you!"

"You won't be killing anyone!" Izuku stood his ground, hiding his terror. He was completely defenseless. He was essentially quirkless again. Momo had all of her chemical compositions and formulas memorized, and Izuku knew none of them.

...Well, he knew one.

Izuku was Momo's main support after her loss at the Sports Festival. And that meant boosting her in all situations, including their final exams. When he saw her take down Aizawa, he immediately began gushing about it to her. She explained how she created a specific object.

Izuku's hand began to glow as he desperately hoped that he was remembering the formula correctly. 

Muscular smiled wickedly, "No one eh? How about I prove you wrong and kill you first!" Muscular shot forwards towards Izuku. 

Momo's heart stopped, "No!"

"Show me your blood her-..." Muscular stopped in his tracks mere inches from Izuku. The boy was holding a Russian nesting doll right up to the villains face. Muscular didn't stop out of fear. He stopped out of confusion. "Wha-...What the fuck are you doing?"

"This." The doll popped open to reveal a flashbang.

*POP*

Muscular's only eye was completely blinded and he stumbled back. "MOMO ATTACK HIM!"

The teen girl realized that Izuku had given her the perfect opening and jumped up using her only good leg. 'This is going to hurt.' Muscular didn't put up any defenses, for he didn't hear Izuku's command. His ears were ringing heavily from the flashbang. She tugged on the new power in her as hard as she could. The muscles in her right arm tightened beyond belief. It felt like her arm was going to explode.

"SMASH!!!" Her fist rocketed into the villain's unprotected face, and shot him off like a bullet into the mountainside. As the dust cleared, his body laid limp against the rocks completely out cold. "... I've always wanted to say that." She turned to Izuku. "Now if you'll excuse me...OW!" She cradled her completely broken arm and fell to the ground. Izuku rushed to her side and pulled her into a sitting position. 

"Oh crap, we have to get you back to the lodge." Izuku pulled off his shirt and ripped it in half, not without Momo blushing profusely. He wrapped one half around her arm and the other around her leg. "S-Sorry, I don't know how to create casts."

"It's pretty simple. All you need is... You know what, not the time." The duo turned back to a crying Kota. 

Izuku picked Momo up bridal style, and crouched down in front of Kota. "C'mon, get on my back. I'll get you back to Mandal-AH!!!" Izuku was suddenly grabbed by the head and thrown, along with Momo, to the side. Muscular once again stood tall, but with a bruised and blood cheek and mouth and missing teeth. 

"Not bad kids! Although, from what I can remember from the festival I thought Midoriya had the strength quirk. Oh well. You're both going to die anyway, so what does it matter?" His muscles began multiplying tenfold. 

Izuku got onto his knees, and helped Momo up as well. He was out of ideas. He couldn't create anything else. He didn't know how. "Izuku, when it hits, take Kota and run."

"What? What do yo-...Wait! No! Momo don't-!"

"I'm happy our quirks were swapped. I wouldn't have wanted you to feel this pain anyway."

"Momo please!" Momo used her good hand to cup Izuku's cheek. 

"One more thing." Their lips collided, even if only for a brief few seconds. She stood and faced Muscular. The villain simply laughed and shot forward.

"SMAAASH!" Momo collided her good hand with Muscular's large mass and sent out shockwaves of force and lightning. Pain erupted throughout her arm. Blood already began bursting out of the limb. "Run Izuku! Take Kota and leave!"

Izuku couldn't move. He couldn't just leave her here. She didn't know how to control this power. And her pain tolerance for it was much weaker compared to Izuku who had broken his bones on a near weekly basis. He especially couldn't leave her after that kiss. If only he could...wait…

Kiss.

Izuku licked his lips and felt moisture that wasn't his own. Momo's saliva. He swallowed it and yelled to Momo, who was buckling under Muscular. "Momo! I need you to want me to have my power back!"

"Nrgh! What!?"

"Do you want me to have my powers back!?"

"THIS REALLY ISN'T THE TIME!!!"

"JUST TELL ME!"

She was confused entirely, but she answered honestly. "YES! I DO!"

Izuku grasped and tugged for the familiar sensation of One For All. He knew the DNA transfer was supposed to take awhile. But, he was already a vessel of One For All. It was already familiar with his body. Maybe the process could be sped up.

...If it was even possible for the quirk to be passed back to a past user, Izuku would just have to hope and pray.

Izuku rushed forward and watched as everything went into slow motion. The feeling of fire and lightning burst into his veins and cells. He reeled his arm back and rocketed forward into Muscular. "100% DETROIT SMAAASH!!!"

His fist collided alongside Momo's. The sheer and sudden power pushed Muscular back by the second. He was losing his ground, and he had no way to stop it. Momo looked over to her partner in shock. "Izuku!? How did you-?"

"I'll explain later! Let's finish it!"

Izuku flung out his fingers, "DELAWARE!"

Both pulled their fists back, "DETROIT!"

Simultaneously they shot their fists forward into Muscular. "SMAAAAAAAAASH!!!"

The villain was completely overpowered. His muscles shot apart and the couple's fists slammed into his unprotected head. He flew through rocks and into the mountain. This time, he was completely down for the count.

The teens slumped to the ground in exhaustion. Momo looked over to Izuku, "So your power…?"

"So that kiss?"

"Uh?" They both turned and saw Kota.

"Don't worry. We didn't forget you. Let's get you back to camp." Izuku stood back up. "Let's try this again." Kota hopped onto Izuku's back, and Izuku held up Momo to his side with his good arm. He had only just realized that the power and impact of her attack had ripped off half of her shirt, revealing a red bra. "Oh sweet Jesus."

"What?"

"N-Nothing!"

…

It was over. 

Katsuki was gone, half of the class was unconscious or injured, and Ragdoll was also missing. 

The only good things to come out of it all was that no one was dead, as far as they knew, and a few villains were luckily caught. Muscular did eventually come to. But, once he stumbled his way through the forest still injured, Aizawa had simply deactivated his quirk. He was taken fairly quickly after that. Some creepy guy with blade teeth, and a school kid were also caught. And finally, the quirk swapper. The police made him give back Izuku and Momo their proper quirks, and both couldn't be more relieved..

Especially Izuku. He had no idea what he would have told All Might if it was permanent. 

Well...if it being gone from HIS body was permanent.

Momo however…

"So, how long is this going to last?" The two sat in bandages and casts (Thanks to Momo having her quirk back and creating them), wrapped together in a large blanket. They were awaiting their turn for an ambulance.

"I'm not sure. You honestly could have my power for months."

"So, I have super strength, but you also have yours back. By...DNA transfer?"

Izuku chuckled, "There's going to be a long story in your future. And a secret that no one else can know. My quirk isn't normal. B-But, maybe we can focus on something else right now. I could use a distraction."

"Fair enough." Momo placed her head on his shoulder. "How's this?"

"M-Much better. So...you actually like me?" Momo lifted her head becoming nose to nose with him. She nodded her head. "Me? Izuku Midoriya? Because you could have anybody, you know that right?"

"You're not anybody. You're Izuku Midoriya. Which, in my opinion, is much better. I really like you Izuku."

Izuku. First name. Oh shit it was real.

"I-I like you too Momo. So much." The two smiled at one another and tentatively brought their lips together once again. They had a rough future ahead of them, but at least now they had someone by their side no matter what.

A/N: I'm super behind on everything guys. Sorry. Life is SUPER BUSY this week, and Thank You's new chapter is super late, and I'm behind on IzuMomo week, it's the holidays, everything is nuts. So, I'm very behind on chapters and writing and such. I don't know when the new chapter of Thank You will be out. I haven't had much time to work on it sadly. I don't know when I will get the next prompt out (Snow Day) but it will happen eventually. I will finish this all. I just need to get it done one step at a time