Ikusei. Fujiwara Masaki has a troubled life. Lately he realized that he was starting to have feelings for his own mother. He realized that it wasn't normal, but he couldn't stop his feelings from overflowing. Unable to even tell his childhood friends about it, he started to get frustrated and eventually lost his sanity. He kept looking at his mother's sexy ass. Her mother's curvaceous and voluptuous body aroused his sexual desires, even the soft motherly voice touched Masaki's heart... and finally Masaki touched his own mother in a fit of lust. Masaki's mother's reaction was very angry, so her mother's hands tortured and punished Masaki, but strangely it even made Masaki feel happy to be punished by her mother.