A son invites his mother on a trip. When the son invites his mother to the reserved family bath, asking "How about joining us for once?", the mother is embarrassed that her aged body will be seen. The son becomes aroused by his mother after the bath. It is the first time since he became an adult that he has seen his mother bathing in front of him. Her breasts and buttocks are ripe and starting to sag, making her look erotic. The son's eyes are naturally glued to his mother's body, and he attacks her.
