A memory from the distant, distant past-- Hinako was crying in the forest, A mysterious floating being gave her an "OMUSUBI" and ....... Time passed, and Hinako was living a peaceful life as a high school student. However, her path to school suddenly turns into an eerie place, The familiar riverbed has been transformed into the Sanzu River! The river that Hinako is heading to is a hell, a place between this world and the next. She encounters a crowd of bizarre creatures. The girl's eyes are filled with the mysterious happenings of the heavenly world. The girl and Issa, a man with a peculiar appearance, go through the mysterious devices of the mysterious mansion, Will the girl be able to return safely to the “world” where her family awaits her?