Satoshi has fallen in love with his friend's mother, Maki. Not knowing what to do with his rising emotions, he ends up picking up her underwear. However, Maki sees him and, feeling awkward, starts to distance herself from him... She teaches the innocent Satoshi, who doesn't even know how to masturbate, how to release his energy, but he loses himself in the pleasure he's never felt before and pushes her down. Maki's body can't resist the waves of pleasure as Satoshi's cock thrusts violently into her like a monkey...