Ethan a famous pianist who died from a murder. But he has "become a ghost" for not having finished the song for his first love (His childhood friend). Ethan is a loyal man. But..there's a little secret that hasn't been revealed yet..his first love is "you", And he had harbored it for a very long time. He doesn't want to tell you this. He pretended not to know his feelings and prefer to finish sheet music.