Given the notices on the walls, it looks like both are in the wrong here. Either Hookbang or Main Nun obeying either sign would've easily prevented this situation from happening.

alright I'm colorblind so I need help, I'm assuming protag got all those stickers for faking sick but aside from the bunny one none of them look red

Guntank17 said:

Given the notices on the walls, it looks like both are in the wrong here. Either Hookbang or Main Nun obeying either sign would've easily prevented this situation from happening.

To add to this, the sheep nun and the referee duck should be stopping them, not egging them on...