Well, because it doesn't feel right calling the deviations in the ending based on who (if anyone) you are romancing a different ending. So there is an ending where you win Homecoming Queen (with 4 variations based on your love interest - or lack thereof) and one ending where you lose.
Of course, the three romance routes have their own separate endings, but they are not the end of the game and your partner still likes you whether you win or lose.
I'm glad to hear you like the art style - the artists worked well together, I think. ^_^