Clumsy with beautiful sister-in-law

Secret love affair with beautiful woman Kokona Asakura. Beautiful girl Kokona Asakura went to the stamp shop with the masseuse because her husband had been working far away for a long time and hadn't come home or so, making her feel so horny. The two of them had sex every time they saw each other, sometimes up to ten times a day, which made Kokona Asakura so happy that she just used a towel to muffle her moans. What will happen to this secret love story?