Overpowered hero Shounen that hides his power and is underestimated by peers and everyone around him. The set up and world is good but the series lacked a soul. The show hits typical shounen tropes: special main character with world destroying powers; powers supressed by a seal; gains friends that changes his outlook; school battle arc.
As the main character has to supress his emotions to supress his powers, it's hard to root or even find him likeable. You don't feel a connection with the other characters either. You also don't get a sense of a story as events just kind of happen. The inconsistencies stops you from feeling invested and it's hard buy the bond or friendship that is supposed to develop between the characters. The characters just all feel a bit wishy-washy and underdeveloped.
That is until the last few episodes when it does get good. But it all feels too late.
The rules of the world are also a bit unclear and not as well defined as other shounens. The animation is decent, but the sound and music mix is off.
The pacing is slow and low energy most of the time. As a result, it just feels soulless.