Natsumi, who has remarried, has twins from the husband's previous marriage. Natsumi, who has become a mother, lives a distant life with the twins, who she doesn't quite get along with. Just when she thinks how to make them love her, her husband suggests that she ask them directly for skinship. Natsumi takes the plunge and asks her sons... and they tell her they want to rub her breasts. Natsumi reluctantly agrees but in fact the fate of seducing her sons has finally come... One of them touches and rubs her breasts and the other rubs her butt. Gradually, her body gets hotter and more comfortable and she even gets teased on her clitoris and cums. In revenge, Natsumi makes her twin sons ejaculate with handjobs and titjobs... The skinship between parent and child gradually becomes more intense and finally develops into threesome sex...