A week after Kenji’s wife leaves to stay with her family before giving birth, her adult older sister Rino arrives to help him clean his cluttered home. He gladly welcomes her, but something about her behavior feels strange. Her deep, provocative cleavage makes her intentions clear. Kenji hurriedly tries to hide the erection caused by her irresistible breasts, but it is too late. “No one will ever find out, so let’s do it right here,” she insists before forcefully wrapping her lips around his cock.