Ryota started living alone again due to his wife's return to her parents' home for childbirth. Feeling lonely in the empty room, Ryota eagerly welcomed his sister-in-law Reina who suddenly appeared. However, Reina's true intention was adulterous sex. Unaware of this, Ryota casually enjoyed his bath, but a sinister hand crept closer. As he was smiled at by Reina's beautiful face and enveloped by her voluptuous, glossy body, his reason began to fly away...
