Since RavenOtakuChan wanted a one shot of her and Osomatsu I thought why not make one? It's fluffy, and has nothing to do with the main story.
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Raven was squinting at her computer screen as she checked the comments on her recent chapter.

"People ship me with Osomatsu? Huh? Well, I don't mind that... he is kind of hot." She said to herself. She put up another tab on her computer; it showed the episodes for the Osomatsu-san.

"Why the hell not? This anime has ruined me so might as well rewatch it." She said clicking play on the screen. It played episode 2, all about Osomatsu being shunned by his brothers.

'Ok I can kind of see why people ship us .' She thought grinning as the scene progressed.
'He is cute.' She thought. Just as the scene was ending her computer shorted out causing her computer go break down.

"OH SHIT!" She tried anything to get her computer to wake up or magically start working again, but her efforts were in vain.
"Crap, if anyone finds out about this I'll be in deep shit." She cursed. Suddenly her computer turned on surprising her. There was a blue screen on it with only place to click.

"Uh, yes? What does that mean?" She said as she stared at the computer suspiciously. Of course curiosity got the better of her like it does all humans, and she pressed the 'yes' button. Then a blinding flash erupted from the screen, and swallowing her whole without her knowing it.
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Speaking of Osomatsu, here comes dat boi *ahem* I mean Osomatsu was walking on the streets with his hands stuck in his pockets. An apparent scowl was on his face as he faced forward.
'Screw them! I don't need those shitty brothers of mine to have a good time.' He thought bitterly. His ears perked when they picked the sound of a female screaming. Not something he heard everyday. He looked up seeing something like a person falling from the sky.

"What the-OOF!" He landed painfully on the ground when something else landed on him. Normally if something landed on him from the sky he would be dead. But this is Osomatsu-san he died several times in his own anime, so he could probably handle it. Groans of pain filled the air.

"Oww..fuck I hope I didn't break anything." Osomatsu heard a female voice groan. He shifted his body so his eyes could see behind him. He saw a tanned skin girl, with blue-black hair, a red beanie, glasses, wearing what looked like a grey flannel and that's all he saw. But a sly grin came on his face as he saw that the girl was actually kind of cute.

"Why helloooo there~" He said playfully. The girl, who happened to be Raven, snapped her eyes open in surprise and looked at Osomatsu. The face she looked like she was both in her favorite dream and a horror movie.

'Wait, I'm not dreaming am I?! That's seriously Osomatsu?!'

She scrambled off of him standing up immediately to get a better look. She even pinched her arm for good measure, but it wasn't a dream. The man, or more like man child, that everyone was shipping her with was right in front of her. She eyed him while he was sprawled on the concrete her perverted side coming out in a flash.

'In actuality seeing him face to face, in a weird reality he has a nice booty. Yeah I would definitely tap that.' She thought.

Meanwhile Osomatsu was doing the same thing as he grinned. His thoughts were already running wild. Raven was the first to snap out of it.

"Oh god! I fell on you didn't I? I'm sorry!" She gave a hasty apology, but Osomatsu picked himself up with ease.

"No worries I suffered a lot worse, although it's not everyday I see cute girls like you falling out of the sky." He said smoothly giving a wink. He wasn't going to flirt like Karamatsu does, he's not as painful. On the outside Raven kept her composure, but on the inside it was like a minefield exploded as her fangirl side took over. In fact it took a large amount of effort for her not to squeal and freak out the man. She did however have a blush on her face.

"You think I'm cute?" She asked.

"Super," Here come the fangirl explosions again.

"So what's your name?" He asked.

"People just call me Raven."

"Even your name is cute." He said booping her nose in a nonchalant manner. Her face turned even more red at the gesture.

"I'm Osomatsu." He said grinning wiping his finger under his nose.

'Oh, I know who you are.' She thought, but kept her mouth shut.
"You're name's also cute." She shot back playfully adding a little flirty undertone. Osomatsu's cheeks turned pink as he felt his heart beast faster at her expression.

"Say Raven-chan, want to hang out? I wanted to do so with my brothers, but you seem like better company." He asked.

'Holy shit this is a date, this is totally a fucking date asdkjl...!! Hell yes I'll go with you!' Her mind was everywhere as her heart beat erratically.
"Of course!" She exclaimed.

Osomatsu became happier than he did before, "Sweet! Let's go then!" He exclaimed taking her wrist and guiding her somewhere. Of course the two didn't care where, they were just enjoying each other's company.
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Osomatsu dragged Raven all the way into the city to the new café that opened, "The Lucky Clover." (Author: Haha iconic)

"This place has the best cakes ever!" Osomatsu declared as the duo stepped into the crowded area. Osomatsu had gotten them a booth, courtesy of one of the maids there.

"Sooooo Raven-chan, you don't seem to be from here." Osomatsu said getting a good look.

"Not really, I'm from America." She said.

"Oh so you're foreign!"

'Come to think of it, how can I speak Japanese?....whatever must be an anime thing.' She thought shrugging. The waitress brought over a platter of different cakes in small slices from chocolate, to fudge, to chocolate mousse, to strawberry cheesecake, strawberry shortcake, and others.

"Whoa! What's with these cakes?!" Raven exclaimed.

"I got the platter just for us! I always wanted to try it, and now that I have someone with me why not spoil ourselves?" Osomatsu said grabbing a fork. Raven blushed hard at the gesture, it's only been a few of hours and he was already treating her like a girlfriend.

'BEST.TIME.OF.MY.LIFE!' She thought while picking out her favorite cake flavor; Osomatsu was already stuffing his crumb covered face. They both eyed each other on occasion, both occupied with their thoughts.

"Hey Raven-chan," Osomatsu called. Raven saw him lean over the table, and then felt his tongue near her lips. He sat back with a grin while her face exploded in color and heat.

"You had cake on your face." He said simply.

'THIS FUCKER! This is not healthy for my heart!' She thought as her fangirl side started taking over once more. She covered her red cheeks with her hands, Osomatsu could practically see the steam come out of her ears. He snickered to himself mischievously at her reaction. After that they both started conversation learning more about each other as they finished their cakes.

"Hey Raven-chan you know what I want to do now?" He asked slyly.

'Is it what I think it is?'

"I want to show you off to my brothers, so let's go! I want to see the priceless look on their faces!" He said grabbing her out of the seat.

'Ok not what I was thinking.'

"W-Wait Osomatsu!" She got pulled out the café to the Matsuno household. He slammed open the sliding door showing all five brothers.

"Hey guys! Guess what!" Osomatsu declared. They gave him a look before turning their heads away.
"I have found a nice girl! And we've been spending time together!" He declared pulling Raven inside. Osomatsu was right, the surprised looks on their face were priceless that even Raven couldn't help but snicker.

"SAY WHAT?!"

"How the hell-?" Todomatsu's jaw dropped.

"She literally fell on top of me." Osomatsu said.

"Ok, but why?" Choromatsu asked.

"Cause you guys wouldn't hang out with me."

Raven felt all eyes on her, she couldn't help but give a grin.
"Don't be jealous, especially you Thotty I can see the look in your eyes. I just really like Osomatsu." That made all of their jaws drop, even Osomatsu. But he clenched his chest giving a fake dramatic tone.

"She likes me!" He cried raising his arms, cue the Hallelujah.

"Unbelievable." Karamatsu said dropping his shades.

"Believe it." Raven replied.

Osomatsu grabbed Raven's hand leading her away from the shocked brothers, who looked too shocked to move.
"Hey Raven-chan, let's do something else." He said.

'Is it?!'

"Wanna play video games?" He asked.

'Nope.'

"Sure."

"How about...Mariokart?" He asked.

"Yeah!" Raven said. Osomatsu threw her a controller, which she caught flawlessly. He set up the game and turned to her with a grin.

"I won't go easy!"

"I wouldn't expect you to. Don't cry like a little girl when I kick your ass." Raven replied with a snarky tone. Osomatsu was taken aback but he smirked in return.
"Back at ya!" He declared.

They picked their favorite characters and the track. For a few rounds there was screaming, profanity, and probably some threats thrown around. But they had fun for the entire time. As they prepared for the last round Osomatsu spoke up.
"Ok let's make this more interesting. A bet, whoever wins can order the loser around." He said.

"You're on!"

"Ok then!" He picked the Rainbow Road course because it's the most evil of courses, everyone knows that. After a ton of button mashing, and screaming it was the final lap. The two of them were so focused on the screen, and Osomatsu being Osomatsu played dirty by trying to push Raven off of the track.

"Fuck no!" Raven turned the tide by pushing Osomatsu off of the track. She laughed evilly at his face as she took first. However Osomatsu refused to give up, and he got a item box silently praying. He got lucky when the item showed a blue shell.

"You wouldn't dare.."

"Boop." He pressed the button releasing the shell. And in the end Raven fell in second while Osomatsu made it all the way to first. She dropped the controller in shock, and Osomatsu cheered.

Raven heaved a heavy sigh, "Ok what do you want?" She asked.

"You." Osomatsu said bluntly.

Raven nearly choked on air as she looked at him in shock.
"Say that again please."

"I want you." He said still being blunt. Raven couldn't believe her ears.

"Well I...sort of found a connection with you. Since the entire day we spent together, I like your personality, looks everything really, and it's the first time I felt my heart beat so fast." He admitted rubbing the back of his head. She could see his blush clearly on his face like the color of his hoodie. She blushed too at his words.

'Since when did this pervert turn into such a romantic?'

"So I was thinking why not be my girlfriend?"

"In just one day?" She asked, just making sure if he was being honest.

"For a cute girl like you yes." He said winking. She felt the temperature rise to her face again, and cue the explosions. She could contain herself no longer as she let out a loud fangirl squeal. She tackled him into a tight hug.

"Huh?!"

"Yes!!"

"Wait what seriously?!" He asked not expecting the sudden answer.

"Hell yeah!" She said giving a grin, he returned it as he glomped her.
"This is awesome! I finally have a girlfriend!" He declared snuggling his face on her shoulder. Their heartbeats sounded loudly as they pounded in their chest.

"Suck it guys!" He shouted to his brothers, but they couldn't hear him. He grinned even wider as he snuggled with her.
"Man who knew girls were so soft." He commented. Of course being the perverted man child he is he couldn't help himself as his hands roamed to her...behind. He squeezed it causing Raven to squeak loudly.

"Yup, soft." He commented. Raven separated from the hug as she punched his chest playfully. Osomatsu only gave a hearty laugh.
"Pervert." She couldn't really argue being a pervert herself.

"Well now that we're a couple you wouldn't mind me doing this." Osomatsu then pressed his lips onto hers in a sweet kiss. A small squeak came from Raven at the contact, but she reacted immediately kissing him back at full force. Who wouldn't want to kiss their anime crush am I right? Osomatsu worked at her lips occasionally nipping, but he worked further as he pushed his tongue unexpectantly.

'Damn he moves fast! But I don't mind, he can really work his tongue.' She thought at the same time she let his tongue dominate her mouth. Things were about to turn steamy until Osomatsu pulled away to breath.

"Wow..." He breathed out. Both were speechless from the move until Osomatsu glomped her again pushing her to the floor. He cuddled with her again grinning playfully.
"I can tell, this is going to really work." He commented. She laughed as she let him cuddle her for the rest of the night. Or maybe not cuddle, maybe something...more went on that night. But that's not for me to tell for now. But I can say it was the start of a great new relationship that's for sure.

A/N:

Me: And done that's a wrap.

Osomatsu: Wow I didn't think you would add something like this here in the fanfic. That was nice of you.

Me: Well I have nowhere else to put it, so I'll put it here for now. Raven if you read this I hope you liked it. Think of it as a special present or something

Osomatsu: I can tell you wanted to write a lemon.

Me: If she really wanted the lemon I'll write a part 2.

Choromatsu: Now are you going to stop procrastinating and finish the other chapter?

Me: Possibly. By the way look at this picture

Isn't that cute?! Imagine Osomatsu as a dad though...he would either be the best or worst.