Aika lives in a two-family home with her daughter and her husband. Recently, I've been bothering me about my daughter and her husband's relationship, so I secretly asked him what he was doing... It turns out that his son-in-law, Shinji, is so big that he can't put in. Aika, who hasn't had her husband for a long time, is fascinated by his huge cock and invites her out, saying, "For the sake of her frustrated son-in-law..." Shinji, glued to her obscene body, couldn't resist and sighed. As she had hoped, Aika began to enjoy her big cock, stolen by her daughter's eyes, both day and night...