Protagonist.....is freaking mind blowing killing everyone. It's anti-hero genre. Story start like any other out there but in just few chapters whole plot goes to next level. I enjoyed it. Should read manhwa The way MC reacts it's many times unpredictable. Story: Protagonist Kin Han Soo killed the demon king after 10 years of being summoned in the fantasy world. Now it’s time to be sent back to earth. What’s this? the fantasy worlds god appears along with his report card. Because he removed all the obstacles that prevented him killing the demon king, his personality score came out as F. The regression that follows is that hehas to return to the the start and begin again. Can Kang Han Soo end this endless returns?