Shimpei harbored deep hatred toward his father for the cruel way he treated his mother. One day, by chance, Shimpei discovers his mother secretly sniffing his underwear while masturbating. In that instant, a new inner conflict begins to stir within him. Torn between his father's abuse, his own desires, and his feelings for his mother, Shimpei's emotions spiral into turmoil. This incident will drastically change the course of his life.