This article follows a moms' volleyball team that is active somewhere in the Kanto region. At first glance, it seems like a normal moms' volleyball team, but there is one unusual club rule. The dads and moms are doing something akin to swapping. "It's my turn this month, so I'm being dominated," says Takkun, the 25-year-old mom who is the most popular member of the team. If there's no reaction, it's not cheating! The moms take turns engaging in sexual acts with the consent of all members! Each mom on duty is partnered with one dad other than her husband. "I want to have an affair, but I don't want to break up the family."