DASS-442 | After a month of showering my mother with love and affection every day, I had sex with her again and again, making a baby. Reina Kuroki

Reina's husband is working overseas, and she lives with her son Shogo. Shogo's friend Shinichi is a grown-up man who looks at Reina and says, "Shogo's mother is still as beautiful as ever." Hearing this, he begins to think of Reina as a woman. Meanwhile, he witnesses Reina, who is lonely with her husband working overseas and has made masturbation a daily routine.