Phantom of the past-demo

Phantom of the past' it's a story about Kyousuke(the protagonist) and his friends. Everything starts when he has to move to a dormitory. He isn't too pleased with the idea but that quickly changes when he sees how beautiful  the place is.

His life seemed perfect but something changes when he receives a weird dairy from a mysterious girl.  Will this make his life even better or he will discover something that should have been left in the dark?