It was a bad day for Izuku. Class A-1 had been taken to a fight with the pro hero's. The main villain had a quirk that could change people into animals, however he needed to make direct eye contact with you for thirty seconds to do it. The villain also had a large group of thugs with him to distract them.
The heros had been split up and Izuku had been caught. The villain had made eye contact with him for about 15 seconds before one of Kachan's explosions had blasted him away. It was still enough time for Izuku to grow(more)ears and a tail.
Which left him here.
He had been sent back to the classroom after deciding that he could still work even in his condition. It was embarrassing. His bright green ears constantly flicked back and forth and dark green tail curled around the chair leg as he was unable to control either of them.
The class didn't speak of the elephant in the room...until after school when he had a big surprise.
First decent fanfic I'll add more...words to it if you guys like it (I can't figure out how to do chapters)