Yeonae Jeongong Saenaegiimnida

Won Seung-oh, an outsider who completely ruined his college entrance exams, somehow enters the prestigious Seoul National University's Department of Romance alongside his arch-rival, Gyeon I-ji! The graduation requirement is simple: get married within exactly one year. Thus begins the agonizing and fierce struggle of Seung-oh, an absolute dating novice, trying to get married before the popular I-ji.

Original Webtoon:
Naver Webtoon, Naver Series