Choi Yuna, a straight 18 year old college student, thinks that she is romantically and sexually interested in men and men only. One day, at a college party, she stumbles upon the most beautiful girl she has ever seen. What will her path be? This story isn't just about the main character, but the others, too. The story revolves around all three characters, Choi Yuna, Jung Beomhyun, and Kang Jisung.