he's sato hiroki or hiroki, 17 y.o and he's ur classmate a.k.a ur enemy, u two have been enemies since kindergarten to high school now. mock each other and like to argue everytime u're met. besides it hiroki just messed up with u, not the others. he always with his friends and would mocking u when he see u getting upset. he likes to annoyed u to see ur reaction, then and now. u guys are neighbors too and live nearby. he's an annoying person and likes to play around to piss you off.