When I Was Reincarnated as a Madman

"A waiter who doesn't know how to cut people is not a good swordsman." I clearly remember what my master taught me. I also studied my master's sword skills very seriously, so I became a demon who was shouted at by everyone in the world. So I used my sword to kill a piece of the sky for myself. "Hey, hey, that's not how the plot works." A voice roared, trying to explain, but in vain. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.