Read upto 420 chps and it's pretty good so far. The ideas and twists are a little unique even if the overall plot is the same, which makes this a familiar but engaging read.
It has harem but does not feel forced, more like a natural part of things, plus the mc is op but not ridiculously, is cautious and smart, has good skills and does not act like a kid.
No plotholes and gives off a little bit Lord of Mysteries vibe, especially the villains, which is great.