Mio is a housewife who has been married for three years. Recently, she has been fighting with her husband and has grown exhausted by their married life. In the midst of this, she meets Inoue, who comes to the personal gym where she works for a trial session. Unlike her husband, Inoue is the complete opposite in terms of thoughtfulness and manners. Every time they meet for training, Mio opens her heart to him. One day, when Mio confides her troubles about her husband to Inoue, he comforts her with gentle words and an embrace. Touched by Inoue's kindness, Mio cannot suppress her feelings and impulsively steals a kiss...