Sorauta

The main character lost his parents when he was a kid and currently lives at his aunt's house. Tamako, his aunt's daughter, takes care of him well and they live a peaceful life. She also knows he can see ghosts.... He is now on summer holiday and enjoys it with Tamako, Chika, his old friend, and Aoi, his friend. But one day, Tamako suddenly leaves her house.... He doesn't know why, but she never comes back. Several days later, he meets a ghost. It is Mana, who jumped off a school building and died....