Shinya has left his wife because of a casual remark. He desperately apologizes, but his wife's mood never recovers. When he was at a loss, his wife's older sister, Karen, decided to mediate the couple's relationship. Karen seems to be worried about her, and the distance between her is strangely close. Just looking at her beauty doesn't stop her heart from beating. She shouldn't be like this. She tries to cool her head by taking a shower, but for some reason, Karen also enters her bathroom.
