The seventh installment in the highly popular series, featuring Hitomi Ohashi, whose maternal instincts overflow from her breasts, is welcomed as a mother. A son struggling with his shallow sexual knowledge and seeking the truth, and a daughter who thinks her first menstruation is an illness. The mother decides she must provide these children with proper sex education! However, what was supposed to be sex education turns into the mother seeking sex for her son's sperm and becoming a bitch...
