My stepfather's slut teasing my wife, please forgive me now...

The Yamagishi couple's husband's workplace goes bankrupt and rolls into their father-in-law Mineo's house. Mineo happily accepts the two of them... Mineo was unable to have an endless sexual desire even as he was old, and he was worried that one day he would suddenly attack Kotone. However, if that were the case, he began planning to make her own, saying, "It's more of a move than a worry!" Kotone is raped after falling under the plan of the good Mineo, who is on the surface. My stepfather's incompetent carnal desires could never end there in just one time...