Lee Yoo-rim is an English teacher at a high school, known for his charm, intelligence, and audacity. Choi Hong, a student teacher who is a year older than Yoo-rim, is skeptical and often dismissive when men show interest in her. During a night out drinking, Yoo-rim unexpectedly proposes to Hong that they sleep together, leaving her unimpressed. This marks the beginning of a psychological and emotional duel, as both Yoo-rim and Hong grapple with their own desires and uncertainties about each other’s intentions. The interplay of romance and longing creates a volatile mix. What is the purpose of their peculiar relationship? What are they truly seeking?