This novel may be of the Mahou Shounen/Magical Boy (sub-)genre but it should be seen as a (trashy) fanservicey and pandering work to fujoshi/fudanshi first and foremost. The story is your generic run-of-the mill good vs. evil with nothing special going on except for the fact that it has a gender-flipped version of the usual Magical Girl stuff we see every anime season.
The characters are all nothing but products made to be paired with each other with no personalities on their own. Their designs look way too girly for my tastes and the fanservice was way too distasteful and overdone to me and thus watering
down my sense of enjoyment.
If you're a fan of fREE! or Yaoi!!! on Ice this novel was made for a public just like you. But if you're searching for a story with actual plot and actual characters do yourself a favor and go look somewhere else. Long story short: This novel is awful fanservice garbage. Totally not worth it.
Similar reccomendations if you're searching for series with fanservice aimed at females (otherwise known as Ho Yay/'manservice') but with actual plot:
D.N.Angel, Fairy Tail, Gundam WING, K, Karneval, No.6 and Shokugeki no Souma.