The son accidentally spies on his mother, Aguri, trembling with sexual frustration in the middle of the night. Desperate to save her, he makes a painful request to the biggest fuck-buddy at school: "Please fuck my mom." While the son is away, the young man gets close to Aguri. Using his incredible technique, he relentlessly develops her mature, voluptuous body. Unable to resist the intense guilt of sleeping with her son's friend, the mother's long-starved body gradually falls into a slave of pleasure...
