A happy young couple comes to the open-air bath of the hot spring resort of Haruyuki... but the wife has a secret that she can't tell her husband!? They came to the hot spring together, lured by an advertisement for a high-paying part-time job! The men's and women's baths are separated by a single wall... Even though her husband is bathing next to her, she is having an affair with a famous actor in the women's bath! She tries desperately to hold back her voice so her husband doesn't find out!