A horror story, in which the main character and her family go to their summer house for vacation and people start dying one by one. The twist is that the main character, Reina, is falling in love with her mysterious neighbor, Maya. But who is Maya really, and how does she know so much about Reina's family?

Note: The series was published as a single volume in 2005 along with two other stories, "Otouto" ("Little Brother") and "Kurisuchiina no aoi sora" ("Christina's blue sky").