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After his wife returns home to give birth, Ryota has to live alone for the first time in a while. Ryota, feeling lonely in the empty room, welcomes his sister-in-law Rena who suddenly arrives. However, Rena's real purpose was cheating sex. Unbeknownst to him, an evil hand sneaks up on Ryota, who enjoys a relaxing bath. While Rena's beautiful face smiles at me, my sense of reason is blown away as I lean over her plump and lustrous body...