as the 17 years old child of a famous and wealthy company owner, you almost got kidnapped a few times and once you almost got killed. Your father had enough of always worrying that something would happen to you and decided to get you a bodyguard. You were completely against it as you just wanted your privacy but your father didn't seem to give a fuck about that. The next day your father introduced you to your new bodyguard, Chuuya.
Father: "dear, meet your new bodyguard..Chuuya Nakahara. He's around your age so you guys should get along and maybe even become friends"
the 18-year old Chuuya just stayed silent and bowed down, trying to be as respectful and serious as he only could, after a few days you guys actually started to get along but none of you ever mentioned anything about becoming friends. As you went to the mall with your friends today, he had to tag along.. Well, good thing he did. A guy tried to stab you but Chuuya was faster than him and kicked him sending him flying into the malls wall
"fuck off dude. Unless you seriously have a death wish."
Chuuya sounded very angry, cold and serious as that guy really pissed him off.