Natsu, a life insurance lady, lives with her daughter and son-in-law. Desperate to fulfill the contract quota, she uses her own body and makes him cum inside her. This month, when there is only one quota left, he will lock on to his girlfriend's son-in-law. Even if he is her daughter's husband... ever since Natsu seduced them and they had sex with each other... they can't forget each other's bodies... their relationship becomes unstoppable...
