You, Who Tamed My Beastly Soul

Come to the Port Mafia

It was night.

(Y/n) was still walking. Well, she was always walking with no destination anyways. She looked up at the sky. Ah, the moon. It was always the most beautiful part of night. How it lightens up the dark night sky. She then sensed someones presence.

"Come out. I know you're there." She said.

Someone walked out from behind a grabage can with their hands in the air.

"Alright you found me." he replied. It was a man. He wore a fedora and was dressed up all fancy and (Y/n) wondered why.

"What do you want?" (Y/n) asked him He walked closer.

"You." He said tilting her chin up to face him. He was slightly taller than (Y/n) and smirked when he noticed. (Y/n) punched him but he wasn't phased by it and still wore the smirk. 

"You're the first one to react like that." she explained.

"I've felt harder punches." 

"So what do you want with me?" 

"It's not me who needs you. It's my boss that requires your presence. But you could be of some use to me. I could always use a cute partner every now and then." He replied.

"Who the he- oh. I get it. You're with the Port Mafia. Eh sure. I'll go. But only 'cause I need to see someone from there."

"That was easier than I thought! Alright, now follow me."

"Wait." she called out to this mystery man. "I don't even know your name."

"Chuuya. Nakahara Chuuya. Whats yours?"

"Ougai (Y/n)."

Chuuya was dumbfounded. "And stop with the smirking. It makes me feel uncomfortable."

"Ou...Gai?!" he said.

"Are you okay?" (Y/n) asked him.

"Y-yeah." 

For the rest of the walk Chuuya crossed his arms thinking about how he called her cute and flirted with her. Hopefully Mori wont punish him or anything. 

~At the Port Mafia~

Chuuya knocked on Mori's door.

A faint "come in" could be heard.

"Thank you Chuuya-kun. Now I would like to talk to Miss (Y/n) in private."

"Of course." And with that he left the room.

Once he was gone, Mori and (Y/n) started talking.

"Hello sister."

"Hello brother."

"Thats oni-chan to you."

"Ok what do you want with me."

"I just want you to be here at the Port Mafia."

"Why?"

"Your ability... It's very powerful."

"And? You know I can only turn parts of my body into dragon parts. I'll die if I do a full body transformation."

"I can partner you up with Chuuya-kun and Dazai. Dazai has a disabaling ability."

"Alright whatever."

"Be nicer to your oni-chan." Mori pouted.

"Eh." and you walked out. Well, almost. (Y/n) stopped at the door.

"Uh... Where can I stay??"

"I can give you a place here but I want to here you say it."

"What?"

"Say 'Thank you ONI-CHAN'" he said, emphasizing oni-chan.

"Fine! Thank you ONICHAN!"

"Your room is the second door on the right." He gave her a fake smile and she walked out.

She walked straight into her room and flopped on the bed.

Then somebody vigorously banged their fist on her door.

"Mori if its you leave me alone!"

"It's Chuuya and Dazai! Open up!" Chuuya yelled.

(Y/n) walked over and opened the door.

"Hi!!! Welcome to the team!!" Dazai yelled fake enthusiastically.

~~~~~~~~~~~~~

AN: So I decided that the reader should be Mori's sister cause why not and I really wanted to write a Chuuya x reader where you're Mori's little sis and he's slightly overprotective.