Izumo

Touma Hikaru attends Izumo Gakuen High School alongside several companions: his little sister-in-law Miyuki, his childhood friend Nanami, and Nagisa, who regards him as a rival. He has begun experiencing recurring dreams featuring a beautiful shrine maiden. In these visions, she prays naked within a lake. Hikaru feels a troubling sense of familiarity with her. The dreams also include images of an unfamiliar room within the school premises. Driven by a growing unease, he resolves to investigate this room by sneaking inside, unaware that this act will mark the start of an extensive journey.