OKSN-210 - "Sex isn't just intense," Ryoko Murakami, a mother gently teaching her son who keeps pistoning

Ryoko, a mother, worries about her shy only son. One day, she finds sticky dirt on her son's underwear, and discovers his mother Ryoko's underwear in her son's room. Ryoko realizes that her son has sexual problems, so she uses her own body to teach him sex education. However, the son becomes fascinated by his mother's ripe yet beautiful body. Ryoko attacks the mother who is secretly masturbating and forces his penis into her vagina, but Ryoko happily accepts her son's growth.