The Corruption of Union Academy

Y/N Hatsune is a student of Union Academy but is bullied for not having a semblance, quirk, or sacred gear it was the holidays and he went out for a stroll before encountering a strange entity calling themselves The Harvester. The Harvester challenged Y/N to a rap battle, after the first song, the Harvester asked Y/N to join their quest to restart the world using the Harvest Moon and Y/N realized this person was a villain and started the next song before falling to the corruption.