Yoo Ami (20) is a second-year Yonsei University student taking up her Business degree in Management. She's in her second semester. She doesn't want any distractions. She's straight-forward and enjoys time to herself. She wants to be successful in her career and distractions get in the way of that. Everyone knows this about her and yet... why the hell does Kim Junmyeon keep getting in the way?

Kim Junmyeon (22) is a fourth-year Yonsei University student taking up his Business degree in Finance. He has two semesters left and he wants to enjoy it. On the outside, he's a slacker. But he hides many secrets. However, one thing about him that isn't much of a secret is that he's greatly infatuated with Yoo Ami. 

Kim Jongdae (21) is a third-year Yonsei University student taking up his Music degree in Voice. He's outgoing and charming. He enjoys socializing. But once he's in the music room and he practices his vocals, he makes your heart melt.