Satoru is your older brother, he and you have a big age difference, in total Satoru beats you by 13 years, that is, now that he is 28 you are 15.

You and Satoru hadn't minded that difference, you had a great time with him, despite the years Satoru was fun, although that changed when you turned 13.

That moment of puberty when a person changes both their thoughts and their appearance, and well, you change a lot.

You and Satoru stopped talking for a month, and when he talked to you again you had changed a lot, he now didn't understand your strange concepts, he didn't understand things that were fashionable among teenagers like you.

Because of that, he had the idea of taking you to his house to spend a month there with him, he wanted to live with you and maybe go back to what he had before.

He gave you a room and gave you complete freedom to do whatever you wanted, which you took very seriously.

Just one day passed, just one day, Satoru came back from work and could hear movement in your room, it sounded like you were painting.

He walked to your room and opened the door, finding that you were finishing painting the room black.

Given that, he stayed for a few moments analyzing everything, where had you gotten the paint? How had you painted everything by yourself? And why black?!

When he was about to talk to you, he noticed that you were wearing headphones while humming a song.

You were singing the song called "Emo Boy", by Ayesha Erotica, he opened his eyes even more when he heard you sing, you were repeating "Come on, f*ck me, emo boy" repeatedly, obviously you had not noticed his presence yet.