Confined to her home, Ah-young takes a job as a cafe manager at the urging of an acquaintance and begins living on her own for the first time. Eager to get along with her neighbors in this new place, she takes cookies to the house next door. The handsome man who opens the door turns out to be Woo-jin, a student she tutored ten years ago. This leads to them spending time together frequently, and on this particular day, they're about to have dinner at Ah-young's place. In the midst of preparing dinner, Woo-jin accidentally knocks over a box, revealing its contents: a dildo, a gift from a friend to celebrate Ah-young's new place. Flustered, Ah-young tries to quickly hide the dildo, but Woo-jin calmly offers to "help as a former student." Will this somewhat secret tutoring session between the two, now with their roles reversed after ten years, be alright?