The season is summer. Majima Masaharu who won a vacation trip invited his university's classmate, Seta Kiyohiko to participate in the tour. The trip is supposed to last seven days. The destination is a small island called Small-Sleep Island in the waters of Okinawa. They were supposed to stay at the pension named "MaYA" there. There were five invited people who also won the trip staying at "MaYA", other than Masaharu and Kiyohiko, four of whom are women. Majima's friend Kiyohiko is excited about the expectation that summer romance can be experienced on this trip ...

[Translated and slightly re-arranged from DLsite Pro]