Ano Ko no Kawari ni Suki na Dake

Reina and Akio are happily married. Reina’s mother, Minako, appreciates her son-in-law very much, particularly because of his polite manner, but his physical advantages have not escaped her notice either. When Minako accidentally stumbles across some of her daughter’s very revealing clothes, she tries them on and is promptly surprised by Akio, who confuses her with Reina. She assumes that Reina is no longer giving him the attention he so desperately needs. So she makes him an offer that Akio can’t refuse …

Ano Ko no Kawari ni Suki na Dake, 実娘[あの子]の代わりに好きなだけ, 친딸(그애) 대신에 원하는 만큼