A school wonder life of two girls! Nagi, a girl who sees stars in her eyes when she wonders, and Yu, who cares for her. The friendship between the two people is at the mercy of the mysterious events that occur...

Just before Saho Hanawa was about to matriculate into Seiran Middle School (her mother's alma mater), she meets a ghost girl, Chie, who's wearing the Seiran school uniform and standing in the rain. Saho assents...