Yurika, who was forced to divorce from her detached husband, made a mistake with her son Mitsukazu in the nervous system of polishing down. One day, Koichi, who had lost her energy by seeing the squeaking hysterical screams every night since his old gentle face was gone, reveals a secret to his friend's nephew. In fact, however, he had been in a cross-sectional relationship with his mother Sumika for several years. and his nephew groaned at Mitsukazu. let's exchange each other's mother and have fun.