[Machine Translation] Let's solve the seventh mystery. On their second day at high school, Ren Nakazato and her friends are stuck in the old school building when they try to join the "Summit Exploration Club". In order to escape, they must solve the riddles of the Seven Wonders, but the threat grows stronger as the number of letters in the riddles increases. Only three mysteries remain. Will this night ever end? And what is the true nature of the mystery? The occult, boy meets girl, and coming-of-age mystery is completed by Takuma Sakai, the author of "Heat Up the Pig's Liver"!