Seungwan and Chanyeol dated for almost four years, but Chanyeol fell out of love. Being in the same squad made it difficult to move on, especially when he still lingers around her. 

Unable to move on from her ex-boyfriend, Seungwan found herself sad and bitter during their graduation ball. She watched as the two lovingly danced together while she downed herself with alcohol, only to be distracted by a gentleman who would help her realize a lot of things.