Hyuna has returned to Seoul after living in Busan for the past few years. She decides to surprise her best friend Zico by not telling him a thing and suddenly showing up at his university.

Zico has always seen Hyuna as more than a friend but has always been too afraid to attempt anything in case it ruins their friendship. He had forced himself to swear that he wouldn't do anything unless Hyuna showed that she was interested in him. He was always going to always keep that promise but that was until one person decided to jump into their lives. That person being;

Jang Hyunseung.