Jang Jae-young (Park Seo-hyun), a man of the hour in the School of Engineering, is a senior in the visual design department with a model-like figure and face. Choo Sang-woo (Park Jae-chan), a fringe student with excellent grades, is a senior in the mechanical department.Sansheng, has excellent logical skills but is a bit of a nerd.Two people with completely different personalities made a mobile game together by accident. To Qiu Sangyu, Jang Jae-young was like a bug in a computer program, and a sweet campus love began.This drama was adapted from the popular novel of the same name, and was later made into a web comic and animation. This time, a live-action drama has been launched, which shows its charm.