It's somewhat like reading the diary of an adolecent kid. Everything revolves around the kid, the teacher gave him bad grades because he doesnt like the kid, the sun rises in the morning just to force the kid to wake up, etc. The whole world is only as important as it relates to the mc. I have the strong impression that the side characters of this manga dont actually exist and are just the imagination of the main character. I feel like when they are not interacting with the MC they are in some empty space just waiting.

Terrible characters, absolutelly terrible.

The story is also not very good, i like the premise, but it seems like the author had no idea where to take the story. So he starts to shove alians, dinosaurs, vampires, robots, phsychics, etc, just anything he can come up with.

The one good thing is the art.

I recommend "reading" the japanese version, if you dont know japanese. That way the terrible plot, characters and narrative wont get in the way of the awesome designs.