Can the super premature ejaculator sensitive exclusive actress Mio Mao endure the tongue licking sex of her insatiable father-in-law...?! A situation where she must hold back her voice and not cum next to her husband! Mao, who lives with her husband's parents, was worried about her father-in-law, who was depressed after her mother-in-law passed away a few days ago. Her husband has been drinking more and is unreliable, and it seems like he can't bring himself to say that he wants to have a baby soon... One day, while her husband is sleeping, her father-in-law comes on to her. Even though she knows she should never accept it, she can't help but be sucked in by her father-in-law's tongue kiss and cunnilingus...!