The drama focuses on the life and relationships of a group of university students, particularly the difficult relationship between hard-working scholarship student Hong Seol (Kim Go-eun) and a deceptive senior, Yoo Jung (Park Hae-jin).

Although she is unsure what kind of person he is, they begin an awkward relationship complicated by the distance between them as well as the aftermath of his various schemes.

The situation is further complicated by the arrival of Baek In-ho and his sister In-ha, childhood friends of Jung who have since had a falling out.

[18] It won praise for its realistic depiction of the life of university students, but was criticized for diverging from the source webtoon by placing undue focus on the second male lead[19][20] and including an original ending "that was rushed and left many viewers baffled".

The series was adapted into a film by the same name, starring Park Hae-jin opposite with actress Oh Yeon-seo, which was released in March 2018.