They passionately press their lips together and entwine their tongues, not caring that their saliva gets mixed in. The relationship between the two, who are completely absorbed in sex, is that of a senior's wife and his senior's junior... a secret relationship that must never be discovered. The senior's wife, Nanami, has a good relationship with the senior, Kota, and the senior's junior, Shinichi, is also married and living a happy life. The two have excellent physical compatibility and have no intention of stopping their relationship. A double affair that burns hotly because it is not allowed, with instant sex!