The novel is called Shadow. It tells the story of Kawako, who is about to graduate from junior high school, and was framed by her best friend for campus bullying. One day, Kawako couldn't help but fight back against the abuser. In the end, she was admitted to a good high school with good grades and got along well with her friends. However, the incident in junior high school still brought a psychological shadow to her and made her miserable.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.