This looks like a variation of the common theme of the underdog who makes a pact with a strange entity and gains power from that.
There's a ton of webtoons like that, but that doesn't mean execution doesn't matter. I've included the link to the raws and the Naver thumbnail picture suggests an element of (dark?) humour. If so, it's right in my area of interest.
The first chapter was solid. The art is simple and easy to edit, so maybe we can dare hope the scanlation group will be able to keep a nice pace even redrawing SFX as they are.