It only takes a minute to sign up. I remember that out of the 2 boys, one was a boy who was from a different planet dimension? He played the piano and it had strange effects on those around him. The other boy was human. The human boy and the girl were friends. This anime probably had a school setting.
Two Guys and a Girl | All The Tropes Wiki | Fandom
It gets a bit more They grew up together, they've always been best friends, they're going to be happy forever, right? Inevitably, the main character, often The Messiah , gets pitted against the other guy, who is the Rival Turned Evil. Usually Because Destiny Says So.