Son Chaeyoung is a new transfer student from US at JYP University. He's a good looking guy and have a lot girl, fangirling~ over him. But his eyes caught to the most beautiful girl in the university. Chaeyoung fell in love with the girl name Myoui Mina, and as time goes by, Mina also like Chaeyoung but she has a boyfriend name Yoo Jeongyeon. Out of nowhere, Im Nayeon, came back with a hope to get her ex lover, Chaeyoung back. Will she succed? Will Chaeyoung accept her back? What will happen to Mina and Chaeyoung status if they keep hiding it from everyone? Will they be together forever? But how about Yoo Jeongyeon?