A mother and son, unable to leave the room after ejaculating 10 times, endure each other's lovemaking, resulting in frenzied ejaculation. (Morisawa Kana, DASS-587)

Unable to stop masturbating, Kazuma uses his mother's underwear to stimulate himself. His perverted mother, Kana, is so excited that she even stains her underwear with the scent to induce masturbation. Unable to stop masturbating, Kazuma desires even more extreme actions. One day, during a project recruitment event for the AV production company DAS!, he discovers an activity called "Unable to leave the room after ejaculating 10 times," and secretly signs up without telling him. ...