Let's start off with the good. The art is fairly decent. For the most part, colors are nice, and natural features such as the trees and character outlines are quite nice. Hikari's outfit in particular is great. Sound isn't really noticeable for me until near the climax, in most cases it was absent at all, which sometimes is a nice change of things. The humor and ecchi was entertaining, I found myself cracking up from time to time. The side characters do a surprisingly good job blending in, almost better than the main roles!
My biggest irk with this series was the fact that it starts to become interesting right from the start. Then suddenly, it sidetracks into something different. Only near the end are we reminded of the first episode, and "Oh, by the way, the world is in trouble!" The idea behind evolution and fate is an interesting one, but it's a bit difficult to comprehend and follow. You are left with a lot more questions than answers. The producers kind of through you into it and expect you to eat it all up and nod your head. Some characters are decently developed, while others are flat and stale. Sure it was only 13 episodes, but I've seen animes do better with fewer episodes. I personally am not fond of the guy loves girl concept occurring after only the first episode.
There are two sides to the story. Akari's side and Hikari's side. I found Akari's more interesting than Hikari, maybe because Ryo's personality was interesting and mysterious. Takeru on the other hand is a piece of work...
The story was rushed and it feels as though we're sidetracked for six entire episodes before things start to get interesting. By then, it's too late to save the show and the ending is predictable.
It will please some certainly and like other have said, you could watch the first two episodes and then skip to near the end and not lose site of anything. If you can look past the story and just take it rather lightly and enjoy the humor and cute girls, then you might be alright, but even that gets stale eventually. If I wanted to watch several episodes of filler, I'd watch something else. This anime tries to be too much - an action, school life, ecchi, and romance/drama. My advice is to give it a shot, and if you find yourself not being drawn in, then walk away. It wasn't a complete waste of time, but it fell far short of what I had been expecting it to be.
