[Easy cure + falling horse literature + strong alliance + reincarnation of old enemy + reunion after breaking the mirror]
After being seriously injured and losing my memory, I disguised myself as a human girl and entered the demon-killing class of my old enemy, my senior brother.
I wanted to observe secretly, but in the end, the barrage in my mind was maxed out in every class:
"Senior brother, the gestures you taught are wrong in three places, and the path is crooked fifteen degrees."
"I created this step. There is a fatal flaw in the seventh step..."
Until I discovered that these demon-modified exercises can make people go crazy, and the senior who taught me the most seriously suffered serious internal injuries because of this.
What shocked me even more was that his body contained the mark of the Demon King that I planted three hundred years ago.
