The narrative is narrated from the perspective of the heroine: from a top student to a bad student, and then from a bad student to a top student.
The heroine met like-minded friends in high school. From being rebellious in adolescence, she became a scumbag, and then a scumbag turned into a scumbag. She got a notice from the school she wanted and understood that studying is to pave the way for a better life in the future.
(Guiding friends, guiding parents, guiding teachers, full of bugs)