The story is about girl called Magpie who acquired a miracle(power) - fire. A fire that burns everything including demons, who are unkillable for humans, and even it's user. To extend her lifespan she have to kill demons but only killing powerful demons extend it significantly. It was pretty good until the last chapter when she went back to the past. While it's expected she'd kill then the most dangerous demons and bring peace - nothing like that happend. The whole story is stuck in an endless loop where nothing changes: she acquires power > she wants to defeat ash demon whose this power is >she goes back in the time > she gives that power to her past self > she dies as the ash demon > repeat.

*I may understand something wrong but that's how I see it.

Overall: 6/10 I enjoyed it before (that's why the score is still positive) but the ending was the worst one I've ever seen and destroyed the whole fun I had with this manhwa..