Suyun desires girls. The one she wanted the most was the prettiest girl in class, Kim Jiyoon. However, due to Suyun's avoidant personality and superhuman patience, nothing ever happened. After successfully entering the computer engineering department at Korea University, she spent her days feeling bored, until she encountered Kim Jiyoon again, who was crouched on the street crying. She was still incredibly beautiful, which stirred Suyun's heart. However, since Jiyoon was obsessed with boys and the reason she was crying that day was because of her boyfriend, Suyun quickly shut her heart. But the two end up crossing a line after drinking too much at Suyun's place...