The appeal of this manhwa is seeing Yujin slice things in half. Like, doing that thing where feir sword sends a flying slash through the air which cuts everything cleanly in its path. The artwork carries all the weight, with several of the fights being pretty aesthetically intense and the characters being pleasing to the eye. That said, I don't actually really care for the "slide method" of showing peoples' bodies getting cut in half. It's supposed to show the speed with which fe's cutting, but it just seems like a digital shortcut. Fe fights against people with various weapons and superpowers. The story is that there's a secret organization connected to ability users who sometimes ask people the question "Do you believe in god?" while massacring them. Apparently on a whim, Yujin had been allowed to live after seeing all feir friends massacred and being asked that question, and is now getting revenge. It's, um, how do you say, a weakass premise.
It was apparently either cancelled or dropped after Season One, meaning there's no sense of resolution.