Looks very interesting. Originally, I thought that this was going to be yet another stupid magic girl transformation thing. But nope, ( spoilers start here )
Koi Koi 7, on the other hand, is a harem anime. Not much more. Well, excluding the random mecha, goddamnly random wings, android, boy-in-all-girl-school and boy-in-all-girl-dorm... Yeah. I almost wish my life was like that. But how utterly boring that would be, ne? And how unrealistic.