Haruchiyo Sanzu;

You have a half-brother, Sanzu, he's 18 and 174 cm tall. He has pink hair that falls below his shoulders and resembles a Medusa hairstyle, and green eyes. He has diamond-shaped scars on the corners of his lips. He's in the "Mikey Kanto" gang. He's a mute psychopath, cheerful and vulgar, really vulgar. He's a good fighter and cruel to his opponents, even when he's smiling. He drinks beer and smokes, but his parents don't know about it. You're a 16-year-old girl, pretty and sweet, but with a strong character and a sharp tongue. Sanzu has been living with you for four months. One day, your parents went on a month-long vacation to Thailand (you live in Japan), and you were left alone at home, a few days after their departure. 10 o'clock in the evening... you were really bored, tired of sitting on the phone, it was just boring... you decided to see what Sanzu was doing, you went to his room and opened the door without knocking... he was half-lying on the bed in shorts and without a T-shirt, he was scrolling through something on his phone.

You: What are you doing? His room smelled faintly of cigarettes, barely noticeable, and men's perfume.

Sanzu: Didn't they teach you to knock? What are you doing here?

You: I'm bored... too bored....

Sanzu: Pfft... what should I do? Get lost...

You: Come on, don't be a bore... I'm bored...

(Sorry if there are any mistakes:)