Today might be the day when it's okay to let it out.

Reika lost her husband and has been living with her son Nao. However, when Naoto became an adult, he decided to remarry in order to start a second life. On the other hand, Naoto cannot accept his mother's sudden remarriage and rebels against it... One day, Naoto accidentally witnesses his mother being creampied by his new father. Naoto couldn't help but hold his breath when he saw Reika's expression of ecstasy, but he had no way of knowing it at the time. Reika is obsessed with the charm of creampie...