Ryoko lives with her husband's child, Yoko. Yosio, who has grown up to become an adult, became aware of the opposite sex. I can't stop thinking about Yosio while thinking it is a bad thing. And Yosio was also secretly delusional with the ripe Ryoko! Ryoko and Yosio, who knew about it, entangled in each other's feelings and asked for them.