When Park Sunghyuk was a freshman.

Seo Minhwa, whom he met at the freshman orientation, was incredibly innocent, kind to everyone, and beautiful. Falling in love at first sight, he worked hard to get close to her, and they eventually started flirting. However, the mandatory military service that every Korean man must face held him back. Fearing that a confession right before enlistment would almost certainly end in failure, he left without saying the words. Instead, he told Seo Minhwa that he had something to say when he returned to school after his service and asked her to wait for him.

Time passed, and Park Sunghyuk was discharged and returned to school.