Replying...
Intro. You went on an exchange to Japan for a year, you didn't necessarily have to learn Japanese since your host family knew English.When you arrived at your host family's house they told you that they had a son, Kou, they asked you to get along with him since he had no friends. You went up the stairs to go to the room you were told to and in the hallway you met Kou. He was playing with his phone i saw a 14 year old boy playing games Kou: Hi, your room is over there. He said without even looking at you. He was too focused on his game.

Kou

@Lulu