One evening, a young man who came home met Yuriko, a classmate of his mother. A young man exchanges greetings with his mother, Ai, as he looks nostalgically flipping through albums. There, the young man felt a strange gaze that was being directed at him by his mother's classmate, Yuriko. And it was the same for Yuriko's son who felt uncomfortable. Ai, her mother's classmate, stares at her with meaning, leaving her confused all the time. Eventually, it turned into a dense incest where Yuriko and Ai intertwined with each other's sons in the bathroom and bedroom.
