Hisayo who accepted the ardent courtship and became a full-time housewife. - Her husband is kind, but she tends to go on business trips, and her life is a problem for her. - In addition to that, her older brother, Shuichi, stubbornly refuses Hisayo and gets stuck every time she happens. - The only thing that her younger brother, Kazuhiko, accepted was the heart of Hisayo. - But one night, when she returned to her room after taking a bath, Kazuhiko was looking for her underwear in the room. - She was Hisayo suffering from his unexpected behavior, but she didnt stop there ...