Chisato has been married to her beloved husband for 16 years. She sees her husband and son off at the front door, does the housework, and has nothing to do with her free time until 3 p.m. Her husband started calling her "Chisato," but before she knew it, the name had become "Kaa-san." As the peaceful family life continued, Chisato began to forget her true self as a woman. Then, one day, an encounter with a painter awakens the joy of femininity that lies dormant in Chisato. She finds herself seduced by an afternoon of excitement unlike anything she's ever experienced before...