Miyu, a married woman, decided to go on a diet after her beloved husband told her, ``I think you've gained a little weight.'' - I wanted to lose weight by sweating in a healthy way, so I started getting in shape at the gym under the guidance of a trainer! - However, the trainer keeps touching me. - Before I knew it, the trainer had her breasts exposed and started jerking off his dick in front of me. - However, when Miyu looked at her trainer's dick, she started to feel strange. - Perhaps sensing her feelings, the trainer pulls down her tight pants and screws her tight pussy from behind. - Miyu is confused but gasps in pleasure. - Once this happens, it won't stop! - Miyu was deeply absorbed in the affair while feeling drunk on the immorality of betraying her husband.