If you are expecting many plot twists and drama, you are wrong here.
It's a combination of shojo and shonen, the fighting and the relationship with the character is amazing for that what it is.
If you like reading angelic layer, and you want more than you should check choobit, it's from the same mangaka group and plays in the same universe.
Unlike choobits it's not filled with fan service, it's more child friendly and wholesome. Every Character is nice to each other and its more about the fun of playing angelic layer than other things.
It's also finished with in 2h+ of reading.