I've only seen the 1st volume, but it's a very graphical fighter interms of spitting blood and such. A very bright and well done style, but it has a more cheery atmosphere compared to some other fighter animes.
Basically, it's 2 guys who act cocky (trying to kick the school's ass) and end up not only beaten up, but one is "engaged" to the main gal (well, in her mind, they're already husband and wife).
Apart from that, I've seen you typical unstable guy, your high-strung and ruthless commitee and you average 7ft wrestler.
I think I'd enjoy it if I can get my hands on the rest. Oh, and fanservice happens quite oftern, especially withe the white haired Aya (who transforms from kid to adult like a jack-in-the-box).