Kim ~~~~ is an average girl who attends Kakao High School. She is a very outgoing person who is very easy to talk to, especially if she is your good friend. She treasures people who are close to her deeply and even though she can be sarcastic and joking a lot of the time, she is reliable when she needs to be. She just likes to live her life as it goes, keeping it nice and lowkey with no drama involves.

The new semester comes with a surprise. Two new students have transferred to Kakao High School, and they cause a bit of a fuss around the class and become the popular guys of the school.

When Kim Sunwoo and Choi Chanhee enter ~~~~'s life, things start to change. Through them, she meets Ji Changmin and the rest of The Boyz members. Her lowkey life suddenly becomes a life full of drama, and heart flutters.