Cruel School! (Patreon)

After a late detention for making a mess off the school floors, some students decided to hide in the janitors room for when everyone had gone home except the one person who ratted them out.
After all, they knew he would also have to stay late to clean up their mess, but now they want to give him his own special detention!

Shouldn't have upset a marmoset and his copy cat culprit.