A hotel booking mistake leaves an inept married manager sharing a room with Kanematsu, the beautiful, capable subordinate who is always rescuing him at work. She brushes off his concern, saying they can sleep together as long as there is a bed, then proposes a toast after their successful business meeting. Tipsy and more sensual than ever, she moves closer until her lips are right in front of his and suddenly kisses him. She asks about his year-long dry spell with his wife and admits unreliable older men awaken her maternal instincts. Overwhelmed by her seductive aura, he surrenders as their positions completely reverse and they cross the line. She refuses to remain a mistress: if he wants her again, he must divorce his wife—and he eagerly agrees.