Strict parents give Mirina a 5 p.m. curfew, so their dates never progress beyond cafés and museums before her father calls her home. When he is finally invited over, he meets her beautiful, mature mother Toko. Toko orders him to break up with her daughter, but he impulsively pins her down. From then on, he and Toko begin meeting in secret, having creampie sex immediately after Mirina leaves at curfew.