Tsubasa lives with her husband's father, that is, her father-in-law. - They looked out for each other and lived happily together. - One night, Tsubasa was working hard on her married life. - However, my husband is naturally weak, and this time he cums alone and falls asleep before Tsubasa is satisfied. - Tsubasa had no choice but to console herself quietly. - Tsubasa, who was sleeping late at night, felt something strange about her lower body and threw off the futon to find her father-in-law playing with her lower body. - She is surprised and tries to make a sound, but her mouth is covered and she is made to cum by fingering, thinking that her son can't satisfy her. - And Tsubasa was once again made to cum by the violent piston that was incomparable to her husband's. - From then on, my father-in-law took every opportunity to caress Tsubasa and bring her to climax. - Tsubasa becomes captivated by sex with her father-in-law, something she has never experienced before, and finally heads to her father-in-law's bedroom of her own volition...