Secret affair with the beautiful sister-in-law

Clumsy love with beautiful woman Kokona Asakura. Beautiful girl Kokona Asakura went shopping with the masseuse guy because it had been a long time since her husband went to work far away and didn't come home of all kinds, making her sister nervous. The two of them kept seeing each other, sometimes up to a dozen times a day, which made Kokona Asakura numb, just taking out a towel to cover the moaning from her sister. What will happen to this clumsy love story?