The Masataka-Mitsuomi and Maya-Mitsuomi plots were the most fun, as well as the whole School Flashback Arc with Maya's brother. The matter with the dragon eye on Aya and Reiki worrying Mitsuomi, but not being able to interfere without stepping on some really deep wounds of the past was also awesome.
I love Masataka, Maya and Mitsuomi. The story shoudl've circled around them and their development. Nagi is such an unlikeable prick, and he gets to be the chicken with golden eggs that everything gravitates towards the story, which is miserable.
THe villain, Nagi's father, isn't a bad choice for villain. Especially cuz Mitsuomi's mission is to end the rule of fighters with super-powers and all that (as to form a paradise, without those power-creeping nuts). But as does an Oh Great! story, it gets convoluted, running in circles and kind of ends abruptly.
I really dislike the ending XD
And I love every scene with Maya and Mitsuomi. they gave great dynamic and their past make for a dramatic tension. Too bad they never fight as they promised, nor kiss or get together outside of a side-story standalone chapter that I have no idea where exactly is from.
But the art is absolutely gorgeous, the more the series goes