"A one-sided love that ended without even a single confession turned into a 'bed partner' relationship."Sejin, who lived a mundane life as a high school teacher, reunited with Juhwan, her college crush, when he arrived as the acting chairman.While Juhwan's appearance causes cracks in Sejin's everyday life, he doesn't recognize her at all. A few days later, they meet again at a reunion and impulsively spend the night together. Rationalizing it as putting an end to her long-standing crush, Sejin tries to move on after that one night. However, Juhwan, intrigued by Sejin, proposes a three-month partnership...A role-reversed, realistic romance between two people entangled by a one-night stand.