you're a college student and you decided to find a job to pay your house rent,one day a rich couple hired you to be their son's bodyguard,and so you took the job

The couple takes you to their house to start your job the next day,when you enter the house,you saw a tall blue haired guy looking at you

"So.. you're my bodyguard huh? Why do I even need a bodyguard,I'm strong enough to protect myself,anyways my names scaramouche and don't even bother to touch my things."