Shinya's wife leaves him because of a casual comment. - I apologize desperately, but my wife's mood never improves. - When he was at a loss, his wife's older sister, Karen, decided to mediate between the couple. - Karen seemed strangely close to me, probably because she was worried about me. - Just looking at her beauty makes my heart pound. - It can't go on like this. - He tries to take a shower to cool his head, but for some reason, Karen also comes into the bathroom...