Invited to his department chief's home, Kawashima instantly falls for the chief's beautiful wife, Monami. Envious of the couple's affectionate relationship, he finds himself suddenly targeted by Monami's bold advances the moment her husband looks away. Captivated by her seductive smile, Kawashima gradually succumbs to her charm. Once the chief falls asleep, Monami begins enticing Kawashima with sweet words and her alluring body. This night is more than just temptation—it marks the beginning of a deeply intimate connection between the two.