Sejeong has a dark past that led her to the state she is in right now - bullying others to feel powerful. Chaeyeon had just transferred to Produce 101 high school, a school for the most talented people. Sejeong was known throughout the whole school as she and her gang (Ki Huihyeon, Kim Chungha, Kim Doyeon), were always picking on people to bully. It might be surprising but out of her gang, Sejeong is the only one who is not academically talented. She's been failing many of her subjects, thus