Ayaka has raised her son Ryuta as a single mother. By her side was her childhood friend Toru, whom she secretly fell in love with. However, one day, Ryuta witnesses Ayaka's love affair with Toru. Ryuta, who has learned the true relationship between the two, is disappointed, and at the same time, he is lusted by his mother's indecent appearance. Ryuta, who can only see her mother as a woman, attacks her mother with that big cock. Deep in his heart, Ryuta wishes for his mother's happiness and is tormented by conflict, but Ayaka's feelings also change...
