This manga has one of the best endings I have ever seen. Most mangas are either not good or starts good but get worse over time.
And we rarely get mangas with great endings.
BUT this one starts average and keeps getting better. The 2nd half (Ch 45+) is way better than the 1st half(which is good too).

Let's discuss about the characters-
Characters: 10++ This is the area where the manga just shines, it is beyond outstanding.

If you want to see an open-minded MC, you are in the right place. If you want to see the development of true friendship you are in the right place. If you want to see a realistic take on how this society is dumb, you are in the right place. If you want to see how society discourages independent thinking (calling them unsocialistic etc..), you are at the right place. What are you waiting for?? Just read this manga.

Another thing, this manga just keeps getting better, ch 67+ is pure gold!!

Spoilers Ahead (Minor, they will not spoil much)
Many people might fail to realize but Yugami(MC) is a really open-minded individual (like take palm reading), he does not reject the possibilities, collect raw information, make good predictions(mostly correct). Most other individuals just accept or reject something without a second thought, it takes guts to accept that there are many possibilities, and to then analyze them is something else. If seen this way it becomes obvious that Yugami is kind-of a genius.