Black and Silver Wings

Who was that guy? Just when everyone in the adventure group was ready to fight to the death, he appeared and defeated the monster called Nightmare with just one blow. The speed of his attack was too fast, and the red light of the indistinguishable weapon flashed, and the death situation faced by the adventure group was easily changed. The dark-haired young man's lips moved as if he wanted to say something. Everyone waited with bated breath for what he would say. "Um, I seem a little lost..."