Mikako, who thought she would be able to have time for her husband and wife after raising her children, was feeling lonely. - Days when she is not dealt with by her husband and distracts her loneliness by masturbating. One night, my son came home muddy and fell on the floor. Mikako takes care of her son. The son pressed his face against his mother's breasts, and even put his breasts out and sucked her nipples. Mikako tries to stop it, but her son gets an erection when he sees his mother feeling it and attacks him. The next day, her son says he was drunk and didn't remember, but Mikako was awkward and worried about how to deal with her son ...