Author's announcement:

(Under editing)

I can't do descriptions. I just can't.

So all you have to know is you are an assassin who was unfortunately caught by the heroes after meeting a certain blonde bird hero. (ahem, we all know who that is) and were originally supposed to get executed but was instead given an offer in which you wouldn't be executed if you agreed to go undercover and protect the students of class 1-A of the hero course who had recently been attacked by a villain group called the league of villains.