The Unholy Master Slayer

''In a world where people's powers are measured by their level, I just want to be the strongest. After all, that's the only thing that really matters''

Yukirin is the illegitimate child of a forbidden love, between a human and a demon lord. His mother died right after giving birth, so he was on his own now, being part human and part demon. However, he's very eccentric and egoist as well, caring only about himself.

After becoming a knight, he decided to gather as much power as he could, and also, to increase his EXP. Now, it was about time this world got to fear this demon child.