Gokinjo Ura Circle ~Seikyouiku wa Mama ni Omakase!~

Kyoko, an ordinary housewife who lives with her loving husband and a bratty son, is so busy raising her child that she is completely detached from her husband, and is bored with her ripe body. Then, a fellow housewife, Kasumi, invites Kyoko to volunteer. The reality is that it is an informal, hidden circle of experienced housewives who provide practical sex education to boys in their prime, to prevent them from misbehaving. Kyoko, who has registered as a member of the club, is tempted by the sweet temptation of the boys, and is overwhelmed by them.