[A] Let's Do It Once, Teacher

On the day of her ex-boyfriend’s wedding, a man who seems familiar yet unfamiliar approaches Si-Yeon as she causes a ruckus and cries at the hotel bar. The nuance that he had known her before is suspicious, but Si-Yeon wants to be comforted, so she spends the night with him. The problem comes next. The new teacher at Si-Yeon’s workplace is none other than that mysterious younger man and her former student, Cha Ha-Jun! Ha-Jun, who constantly pokes at Si-Yeon’s empty seat, begins to make bold demands without holding back.