Sorry if its a little vague, but from what I remember, it was about a girl who transferred to a new school with her single mother and grandmother. After reuniting with an old friend, she was targeted as the new class victim and was even betrayed by her old friend. She attempted to endure the torture, but it only escalated to even further heights, pushing her to jump off the top of the school building to end it all. But instead of dying, she found herself back several months in time where she could change the outcome of her fate.
Thanks in advance for any help!