The Demon Swordsman : ̗̀➛ BNHA x M.Reader

After Tamaki and Kirishima encounter a strange boy, things take a turn for the worse. He goes by the Demon Swordsman. The boy has never been seen before nor was ever mentioned by any of the pro heroes. Which further raises suspicion on who he can be but what Kirishima and Tamaki both know is that they might have encou...