Her daughter has a boyfriend. Mayuko welcomes her daughter's boyfriend when he comes to visit the house, and watches the happy couple with a smile. But one day, Mayuko is suddenly attacked by her daughter's boyfriend, Takeshi. After many visits to the house, Takeshi is attracted to Mayuko's adult charm. She cannot betray her daughter. Mayuko desperately resists, but she cannot resist the young man's strength... And Mayuko is confused by what she felt, more than by the fact that she was violated...