《Class 1-A has been teleported into an abandoned castle, which is also haunted, Class 1-A is now under the responsibility of fighting the many monsters trapped with them》

Class 1-A walks into the ballroom, which soon after entering, the doors slam shut, they look around as they see the armor hanging on the wall start to move, purple smoke fills them, and it possesses the armor and now the class is surrounded, they have to fight, but after realizing they can't use their quirks, they must fight