Ano Ko no Kawari ni Suki na Dake (2020)

Minako's daughter Rena is pregnant, and her son-in-law (Akio) was a rugby player at school and is big, polite, always cheerful, has a big smile, he's perfect. Rena returns to her mother's house to give birth there. She throws away old clothes with her mom's help until she finds a sexy cheerleader uniform. She decided to try it on. There, Akio, who mistook Minako for her girlfriend Rena, hugs her from behind and asks for sex. When Akio realizes she is his mother-in-law, he decides not to go through with it, and when he tells her about his problems, including the fact that he hasn't had sex in over a month and is nearing the end of his patiently, she tells him: "How about if I take your place?"