I can see the 2 choices in my head:
- She either publishes the pictures and videos of her bullies on the internet and they won't be able to fight back because of the backlash they will face, probably ruining their lives, maybe pushing them to suicide, leaving the bullied girl traumatized and ashamed of the damage she has caused to the others without understanding why.
- She talks to the boy, explaining her situation, and he will do the typical speech "revenge is a fool's game" and she will try to talk to her bullies and understand them, probably leading to a better ending.
I can also be completely wrong, this manga always manages to surprise me at the last moment.