New theory:
The author is setting up a misunderstanding where one day, she doesn't show up to school and the bullies are rumor mongering that she might have killed herself.
The MC will snap at this and become enraged. He will then fight the bullies, wreck them while also getting wrecked and run to her house. Finds her there okay, just having taken the day off.
The scene will progress to her showing concern while he just stares and thinks back to all the things they both did to each other. He then hugs her while she looks super confused, but happy.
It will end with her applying similar bandages to him that we've seen on her most of this series. "Look. We match."
End
Though, now that I've written this, the author probably has something worse in store for us.
But I have hope.