Memory Pawn: the World-Destroying Demon Is Sealed in My Body

I'm kneeling in the subway tunnel, my left arm turning into a dragon's claw. The world-destroying demon is sealed within his body. My weapon is a glass bottle. Every time I kill someone, I will lose one memory. The master's face, his fiancée's name, his past - all returned to zero. The S-class ghost mother wants to take the devil out of my body. She sent the vanguard, and I pawned my last "fear" to fight back. She gathered three hundred people who lost their memory, and I pawned my "love" and turned into a killing machine. I forget the whole world, but the whole world remembers me. Including the demon inside me. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.