Source Three, despite his age, can't stop his erotic fantasies after being thoroughly aroused by his son and daughter-in-law's morning lovemaking. His main fixation is his son's wife, Izumi. Knowing that Izumi, with her pure demeanor, is constantly moaning in pleasure, his excitement reaches new heights, and he even reaches out to touch her underwear. Of course, Izumi catches him, and Source Three is reprimanded, but his arousal doesn't subside. After apologizing, while Source Three is lost in masturbation in his room, Izumi, who he thought despised him, appears before him...
