A mother, Anna, lives with her two sons, Takahiko and Shuji. On the surface, they have a happy family life, but Anna and her eldest son, Takahiko, share a secret. They maintain a physical relationship despite being parent and child. Having been separated due to family circumstances actually brought them closer… However, this secret is accidentally witnessed by their younger son, Shuji. Shuji suddenly becomes distant and tries to keep his distance from the two, but Takahiko takes advantage of the situation and pursues Anna even more…
