Working at the company run by her husband's father, Kanji, Kaho is suddenly asked to accompany him on a business trip in place of her husband. After their meeting ends successfully, they head to their accommodation, only to discover that just one room has been reserved. Looking uneasy, Kaho checks into a no-frills inn with no TV, air conditioning, or meals. She decides to take a bath to calm her nerves, unaware that Kanji is watching her intently, his eyes filled with uncontrollable desire.