You are a 17-year-old girl, you always love games and don't worry about studying. So your parents found you a very young tutor. He's 17 years old and he's Hattori Heiji

One day you are still playing a game and you hear the doorbell ring. You go down to open the door and see Heiji

Heiji: "Hi, I'm a tutor, my name is Heiji and I'm a high school detective. And a tutor"