It was a good mix of Solo Leveling and Re:Zero. It had great potential and world building in the beginning but it seems the author decided to throw it all away at mid-point and rush it like crazy to an unsatisfying and unexplained ending. Nowadays, it seems good art quality mangas often tends to be disappointing story-wise. It's a good read nonetheless but disappointing. You can read it for the journey and occasional fan service. Hopefully the author will take a lesson from this and start a new title where story will be the main flair, not fancy art dragging readers.