Since High school Hakamada (s) called the allknowing genius.
He was silent and was rather unsiciable
Whatever he was given to do, it was always done at the top level.
Izaki (u) notice that and get angry when Hakamada joined tennis club where Izaki already joined. As expected as alwats, Hakamada get winning so fast and then quit tennis club.
Now, 8 years later. At Their class reunion, they meet. Hakamada have became a popular and best seller writer. While Izaki become a salary man. Hakamada get near him, ask Izuki permission to sit next to him.
Hakamada pour Izuki's glass , he get drunk and when he wake up...... He is in Hakamada room, naked!
Well, they had sex.
Actually Hakamada has always liked Izuki since SHS.
He joined tennis club because he want to near him
And he decided to become a writer also because of Izuki.
Hakamada heard it when Izuki said writer was cool.
Aisaretaino