Well a lot of "magical girlfriend" shows are about "POOF! A gorgeous genie girl..." It's a sub-genre to romantic comedies usually but can also be more action orientated such as Kurokami. I'm not sure what the very first one was, but one of the earliest was Urusei Yatsura by female manga author Rumiko Takahashi. In that one, hot alien girl, Lum lost an intergalactic competition to perpetually rejected Earthling, Ataru and fell for him thereafter. It's not logical but why bother with that? It's a ridiculous slapstick comedy that frequently drifts into folklore territory. Is it a male fantasy? Absolutely, just as I Dream of Jeanie, Splash, or anything with Summer Glau. Sekirei is like all of them but with some tournament and harem aspects added to the mix. I really enjoyed the series and season 2 is even better (and since it's a stickler for you, less fanservice). I believe it's actually one of the better from this subset of genres and I've seen my fair share.