Awakened with killing and became the strongest demon king! In order to survive, young Fang Cheng is forced to sign a contract with a “demon Slayer”, and as long as he hunts the demon, he can unlock one combat ability. In this dark age of demon invasion, Fang Cheng vows to fight back and become stronger and make his way to the pinnacle of strength! I’m Really Not A Demon Lord more info another good series here
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