Its You [ Mark X Dahyun]

Dahyun changes to a whole new person. She moves to Ilsan and enroll into a new high school. She doesn't smile. She doesn't laugh. She only does that around her mother, her best friend, Lisa and her sister, Jennie. Her father didn't come along because of work. He visits once or twice but never really stay with them.

Dahyun and Lisa fitted just right, in their new school. Its more like they fit themselves in whether people like it or not. They don't have problems with innocent students. They only have problems with the ones who disturbs them.

But what makes Dahyun's heart soft is, she meets with a guy who reminded her of Mark.