This time shall be a female reader, if anyone really wants a male reader lemon just comment. Requested by @kurodrawer. Warning explicit content ahead, content that will leave your nose in blood. Let the sin begin, ALL YOU SINNERS STAND UP SINGING HALLELUJAH!
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You slammed your head on you desk groaning out of frustration. You had just finished writing out a report for the Armed Detective Agency, however it wasn't as professional as you had hoped it was. You had been distracted the whole day all because of one person, Dazai Osamu. The most quirkiest, yet mysterious guy you had met in the Agency. It all started 3 months ago when you had first started the job. You had met Dazai and immediately something clicked in your brain. As time progressed you had started to gain this feeling of attachment to the detective. Everyone knew you were in love with him, except well him. On this day, two weeks ago, you had gathered the courage to confess in front of him. He was shocked at first, but then he gave a loving smile that made your heart melt. He had also stolen your first kiss that night, and it was one of happiest moments or your life. Although he was always pestering you to commit a double suicide, or as he called it a "Lovers suicide" now that you two were dating; you had always declined of course.

However the only thing that was frustrating you, is surprisingly the relationship. It wasn't that you were unhappy, far from it. You just had this growing feeling that you wanted something more. It had been hard enough maintaining the relationship you already have because of the work you two had to go through, so asking for more was just selfish in your opinion. But you couldn't stop this feeling, and you knew what it was...lust. You and Dazai never went far as to do.."it." You had advanced so far as to have this explicit thinking in your head for your boyfriend. Of course you would never admit that to your boyfriend as even the very thought would make you very embarrassed.

"(Y/nnnnnn)!" Dazai called you cheerfully. You saw him waving like a young child making you both smile and sweat drop.

"Hello Dazai-san." You said.

"Hey, you're still using the honorifics? I told you call me Osamu now!" He exclaimed.

"Ehh, I'm more comfortable with the first option. Do you need something?" You asked.

"Actually, it's important.." He whispered giving you an intense stare that made your heart race.

"What do you think of jumping off the building hand in hand?" He asked. You facepalmed while sighing not even bothering to scold him.

"No." You said giving him a deadpan tone. He frowned at you while pouting.

"Aww I thought it was a good idea." He said. Your heart kept pounding as more heat came to your face.

"I'm not taking part in your messed up thinking with suicide." You said. You couldn't control your composure anymore as the lustful feeling started growing.

"U-Um Dazai-san, excuse me!" You bowed at him before running to the bathroom to calm yourself. He raised a brow suspicious at your actions. He knew you were acting strange but never brought it up, you had been like this for three days. Acting more fidgety around him, trying to come up with fake excuses to escape him. He never pestered you about it because he first thought you had something in your private life going on. Now his curiosity was starting to grow, and being a very skillful detective he automatically started making assumptions.
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You unlocked the door to your apartment sighing heavily. You were tried and a little frustrated.

"I would just ask him, but that's embarrassing and what if he thinks I'm weird." You mumbled. You decided to relieve all the stress by having an evening to yourself; taking a bath, making tea, and watching a movie. You went in the direction of the bathroom starting the stress relief.

Once you stepped out of the bath, you dressed into comfy clothing, a (f/c) tank top and grey sweatpants. You made yourself tea, and settled yourself on the sofa turning on your TV.

You had found a nice comedy movie, laughing helped you distract yourself from the stressful thoughts. Just as the movie had built up to a comedic moment you heard the doorbell ring.

"I don't remember inviting anyone." You mumbled. You went to the door and cautiously opened it. Your eyes widened in shock as you saw Dazai standing outside.

"D-Dazai-san?!" You squeaked.

"May I come in?" He asked. With a huge blush on your face you lead him inside to your living room.

"W-What's wrong?" You stammered. Your heart pounded as the lust started growing.

"I've been thinking recently, about your behavior these past three days. You've been...strange." He said, his back was facing you.

'Oh no... What does he mean by that?!' You thought in a panic.

"After thinking it over, I finally figured it out." He stopped there leaving you confused. He then grabbed your wrist pulling you into a rough kiss wrapping his arms around your waist. You got caught off guard as the two of you melded your lips together. You closed your eyes as you sunk into the moment and wrapped your arms around his neck. You parted your lips willingly and he let his tongue enter your mouth, the feeling of his tongue in your mouth caused a funny feeling. He stopped the kiss, while a moan left your mouth from the feeling. You panted hard and looked at him with shocked eyes.

"W-What was that?" You asked.

"You have been growing lustful haven't you? You've been wanting me to do that and more to you, but you've been to embarrassed to admit it?" He said correctly deciphering your feelings. You blushed heavily, embarrassed, and gazed at the ground.

"Hey..." He whispered; he lifted your chin making you look in his eyes. You saw not anger, but love, nothing but love.

"It's ok, we have been dating for two weeks. This is my chance to prove how much I love you." He said. You wanted to cry at how he said that, you knew, even if he is a suicidal maniac, at this moment you loved this man even more.

"I love you Dazai-san." You said giving him a hug.

"As do I with you." He said. Then he leaned towards your ear, "Now shall we start my dear? It's about to get naughty in here." He whispered huskily. You blushed heavily but gave a small nod. You two went into your bedroom hand in hand, making sure to lock the door of course, and the night of passion started.
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(Warning: Lemon starts here! Turn back now if you're innocent! This your time to run children! RUN FAST AND DON'T LOOK BACK! I'm about to feel really embarrassed afterwards but YOLO!)

Dazai attacked your lips furiously, but you felt a twinge of gentleness to it. You gladly returned it giving the same amount of passion he was giving you. You stumbled back on the bed making a small thud on contact. Dazai hovered over you while still kissing you. He took the bottom of your tank top sliding it up while your were distracted by the kiss. You two separated, and he took off your tank top revealing your fully exposed torso and (size) breasts.

He raised a brow at you, "No bra?" He asked in almost a teasing tone.

You covered yourself with your arms looking away from him, "I didn't think anyone would come, I don't like wearing a bra with my pajamas." You admitted.

"That's quite naughty of you (Y/n)." He said with his husky voice. You just looked away even more embarrassed than before.
"But I won't judge you for it (Y/n). You're beautiful in my eyes despite your preferences." He said. You felt warmth again as you faced him; both of you smiled at each other. You finally moved your arms away as you felt comfort under his gaze. He pinned your wrists softly to the bed as he dove into your neck. He left small kisses at first that tickled you, then he started leaving love bites.

"Ah Dazai-san~" You moaned as he found the sweet spot on your neck. He bit there hard, but not hard enough to cause pain, leaving a dark hickey.

"Call me by my first name. I want to hear you screaming it." He said with his face pressed against your neck. You breathing started to become more heavy and his face went down slowly to your breasts. He let his tongue on your right nipple listening simultaneously listening to your loud moans.

"Ngh, haaaah, O-Osaaahmu-san!" You cried as feelings of extant invaded you. He did the same to your left side and you reacted the same way. The way he touched you so delicately made you feel a tingle. You lower area becoming even more wet. Dazai worked himself lower, teasing you with his pace, he took the waistband of your sweatpants and pulled them down revealing your panties.

"Wow (Y/n), this wet already? We haven't even started." He teased. He rubbed the inside of your thighs while he finally got your sweatpants all the way off. He rubbed your clit from the outside, and you felt the tingly feeling return to you even more intensely. You moaned out loud as he continued doing this for a minute. He wrapped his finger around the top of your underwear pulling them off. You were fully exposed and in a panting mess.

"Now fingers or tongue which one?" He asked, you knew he was teasing you.

"Which one (Y/n)?" He asked while he ran his finger over your womanhood.

"Both~" You panted.

"What's the magic word?" He asked repeating his action.

"Please!" You cried unable to take the heat exploding inside your body. He let his finger enter you and you arched your back moaning. He let two more enter, and then three. You felt amazing because of the ecstasy. He pumped them in and out, curling them as an experiment. He loved hearing your moans chant his name over and over. You felt your stomach tighten, a sign that you were about to finish. You came all over his fingers panting out heavily, he licked them giving a seductive look. He waited for you to calm down before he positioned himself in between your legs. He let his tongue glide along the outside of your clit, and you gave a loud moan at the feeling.

"Ahhhh~" You cried as he continued. He plunged his tongue into your core letting it run inside of you.

You squirmed, "Ah~ Ngh~ This feels weird~" You moaned. You came a second time in his mouth and you heard him swallow.

"My my~ you even taste sweet." He said.
"But it's unfair, you came twice while I didn't even cum once." He said. He then discarded all of his clothing leaving him bare in front of you. He hovered over you, and the sight of his body left you a blushing mess once more.

"Um, do you..you know have.." You trailed off feeling embarrassed trying to say the word. He got off of you and smirked at you. He held a packet with a condom inside between his fingers.

"Already prepared." He said. Once he got it on he hovered over you again.

"This is your first time right?" He asked.

"Of course." You replied.

"Then this might hurt a bit. Hold onto my hand if your need to." He said. You nodded slightly as you took his hand in yours.

"Are you sure you want to continue?" He asked, you looked at him a little hesitantly really starting to think if you really wanted to.

"(Y/n)," He grabbed your hand putting it on his chest.

"No matter what you think I love you. I won't go against any decision of yours, you are the light to the darkness I have. I want to share this moment with you full of love and confidence. I really do love you and only you (Y/n)." He said while staring into your eyes. You felt the rapid beating of his heart and his confession made you tear up.

"I love you too Osamu-san, and I want to continue with you." You said intertwining his and your fingers. He softly bumped his forehead against yours as he positioned himself.
"I love you so damn much." He mumbled. He finally entered you, and you felt pain from your nerves shoot through your body. Your face scrunched up a tiny bit as the intense pain make tears form in your eyes. You squeezed Dazai's hand, and he kissed you in return trying to distract you. Finally when the pain died down you squeezed his hand with less force. He started moving, and the both of you moaned in harmony, his deep voice along with your high one.

It was a passionate moment as you moved your hips along with Dazai. You felt nothing but euphoria in that moment, no longer caring about any of the outside world. It was just you and Dazai.

"Ahh~Mm~Ahhhh~" You screamed as Dazai's hips met yours. Dazai was not as loud as you but you heard him groaning. You finally felt a giant wave of pleasure as Dazai hit a certain spot in your body. You screamed as he hit it over and over. He lowered himself into your neck as his movements became more sloppy. You grabbed his messy brown with both of your hands tightening your grip as you felt your stomach tighten.

Both of you moaned your names out loudly as you both came together. Dazai laid on you trying to catch his breath, and you ran your hands through his hair and on his neck trying to calm yourself down as well. Dazai finally rolled off of you to your left side and you faced him.

"That was better than expected." You said.
"Very." He agreed. He took a moment to get the used condom off and went to throw it away, and returned to your sprawled out form.

You yawned as your fatigue caught up to you. Dazai caressed your cheek pulling you into a soft kiss.
"You need rest, we do still have work tomorrow." He said getting a blanket pulling it over you two. You closed your eyes finally happy that you no longer felt the feeling of lust.
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You woke up early the next morning, finding the sleeping Dazai next to you. You grinned to yourself petting his hair before heading for the bathroom.

You went to make breakfast with an even more giddy feeling. Dazai yawned as he walked into the kitchen lazily.

"Good morning.." He drawled out in a tired voice.

"Good Mor-AH!" You squealed and covered your eyes as you saw that he was still naked.

"Go put your pants on!" You ordered shooing him away with your hand.
"Ehhh?" He sighed out.

"But..." He grabbed you by the waist pulling you to him again.
"I was hoping we could do it again." He said. You blushed but pushed him away.

"No, we have work." You said.

"Awww! But Kunikida's gonna scold me again." He whined. You rolled your eyes and pushed him into your room.

"Doesn't matter now get dressed." You said.
"But, now that we had sex we did everything we wanted to before committing Lovers suicide." He said.

"You're still on that?!" You asked.

"Of course..." He said.

"Go already!" You exclaimed. You pushed him into the room and left with the loving thoughts you had about him.

A/N: *in corner* I have sinned. Hope you enjoyed anyway? I don't keep what to say at this point. This was my first lemon too, wow... so how'd I do? I wanted it to be more than smut because I see sex as the ultimate way of proving your love. Sure there's smut but I wanted the characters to actually "make love." Anyway since people wanted more Akutagawa and Atsushi the next one shots shall be about them. If anyone could think of a plot for me then that would be great.