This is probably the BEST mystery manhwa I have read in a long, long time. I agree there are better manhwas in terms of fantasy, the battle system, etc. however, this manhwa has managed to bamboozle me several times, and even after 141 chapters I can only speculate about who the MC is, what the issue with the world is, even the random sci-fi arc is NOT random, there's more behind it and it all kinda makes sense, but at the same time makes no sense at all (due to very little information provided). The re-runs are extremely satisfying and I ask myself how will he do things this time round. It definitely shows a growth of character, and even though it keep repeating the same events it never gets boring. Recommend this to everyone, especially those who love their braincells tickled. 👍