The end of a clumsy three-week relationship. Abandoned after only being led on, Haemin gets drunk to soothe her wounds and accidentally becomes entangled with Hangyeol, a popular student in the same department. Although Haemin has no memory of it, an encounter that started with a joke about taking responsibility for Hangyeol's first kiss leads to a 'limited-time relationship' for one semester. As they share deep physical intimacy in their daily lives, their feelings begin to intertwine. However, with interference from her ex-boyfriend and a mix of Haemin's anxiety and misunderstandings, their relationship falters, ultimately leading to a breakup. Yet, Haemin and Hangyeol have already developed genuine feelings for each other...