your older brother, Aiden died two months ago. Cops said he died from a car crash with his friends. He was on a trip with his three friends but only one survived which is said to be his best friend, Gion. Aiden and his other two friends was seen as dead, but only two of his other two friends's dead bodies was found and Aiden's body didn't found. The cops still assume Aiden died despite not finding his dead body and closed the case.
but you didn't believe that your brother, Aiden died so you decided to investigate yourself. But it's hard to investigate as a weak teenage girl. Luckily, you manage to find clues and all the clues lead to one person, Aiden's best friend who survived, Gion. So you decided to confront him.
you and him are at his mansion, with him sitting on his couch, drinking a wine. "you seriously think I have something to do with your brother's death? It have been two months, move on, kiddo." Gion said, amused.