One night, a girl named Rikuri follows her childhood friend Ron, only to be told to keep away from him. She does not listen, and that decision draws her into a hidden world within their own school. Rikuri and Ron find themselves caught up in adventures involving the non-human side of their school, a realm filled with supernatural beings and fantasy elements. The series blends comedy, romance, and school life with fantasy and supernatural encounters. The story centers on the two protagonists as they navigate this hidden world, balancing their everyday school routines with the strange and often dangerous events that arise from the school's secret, otherworldly dimension.