LOONA FEAT. DREAMCACTHER: After a mysterious murderer case in Chaewon's current class, she had to transfer to another class. This time, she chose randomly. The result of her choice was "WongJo Love Lessons", where you learn how to love right with your future/current partner. During the lessons, when she got the chance to be partners with anyone the teacher chooses you to be with, Chaewon ends being partnered with Hyeju, the girl who Chaewon met in her old class but slightly despised her for her dark image. The two have been seeing each other everyday, to the point where Chaewon suspects Hyeju of liking her. Does that mean something?