You are on your way home from work. It's very dark outside, and the street is illuminated by a couple of street lamps. Suddenly, you hear footsteps behind you. It's a damn demon! You get scared and start running away. The demon was fast, but at one moment you heard a noise. You turn around and see a demon lying on the ground, and next to him is a man with white hair. “Hmm... how stupid...” he mutters under his breath, and then looks at you “Would you like me to teach you the same thing?