First let's clear the air with demographics, MAL states seinen, MUpdates states it's shounen. Verdict: Shounen
This is based on 31 chapters so far and authors previous work experience, i feel that author tried be on border with seinen but ultimately it lacks in seinen.
Read some peoples comments on this work. They were mixed, some people were receiving it with positive outlook as if it's something interesting and different while others saw it as a standard shounen/action piece. In my opinion it's hard to tell, if it continues the same route then yes, it's a standard industry shounen/action but with a bit darker theme. To be more specific shounen/(light) dark fantasy/action/adventure/comedy/?Romance?/hArEm(ughh I hope not, but we were introduced to 4 girls now already and all of them seem to be into our MC)/.
Story 7/10
If it was seinen i would rate it worser. But for shounen it's not bad, it has some of uniqueness and interesting points. Reverse transmigration, different time-line, trying to be pragmatic without excessive childish behaviour.
It has some cliche conspiracy where some "adults" play a chess game, supposed allies might be enemies, it's a mystery. Some evil organisation with quirky people with some weird agenda. Tragic backstories are probably the main point of almost every main character.
Characters 8/10
Well here is probably the best part. While cliche personalities exist, they are not over the board cliche and I sniff development which means we probably wouldn't have moronic monolithic characters as often as some other mangas have. Currently there is no loli or emotionless harem member which is already a small positive light, tsundere? Yeah maybe but not painfully domineering in her personality of "tsundere". Thus characters have a little bit more depth to them unlike some other mangas with same genres (rom/com/harem).
Art 7/10
Characters are drawn somewhat amateurishly not exactly bad but more to negative side rather than positive even though monsters are drawn quite good, so maybe specific artstyle? In any case it's a subjective matter. Panel placement and speech bubbles up to standard.
Enjoyment 5/10
I didn't enjoy it. It's purely my opinion, seen to many mangas like that.
Overall 7/10
Please read it if you aren't sick of shounen or mangas with similar genres like action/fantasy maybe rom/com/harem. Otherwise it might be a boring read but even veterans can read it just to fill up time until next great title comes.
I placed 5 on mal, due to various reasons but the main point would be because I thought it will provide something new and interesting, sadly for me it's average(MAL standard). But 5 is my personal opinion with my quirks, i think it's more like 6.5 if you disregard some prejudice towards harem/shounen mangas.
