We follow a moms' volleyball team active somewhere in the Kanto region [No reaction after practice swapping edition]. 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 like swapping. "It's my turn this month, so I'm being swapped," says Takkun's mom, 25, the most popular on 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 dads other than her husband. "I want to have an affair, but I don't want to break up the family."