Renei is a Fine Arts student in Tokyo following a course of painting enigmatic designs on cloth. She maintains an ambiguous relationship with Koga, her professor and 20 years her senior. Now Renei thinks she's going crazy: she has begun to dream of "Ku's World" all the time, and of Mount Babiranma with its fantastical creatures, Nagizari, God, little Rey and the lethal Teppas. With a tenuous hold on reality, it is not surprising that, when Kaya - a friend who committed suicide - reappears, she is drawn into this world of dreams.