Just your standard gender-balanced Magical Girl anime.Except the primary Magical Girl is powerless on her own, it's set in a world where magic is running out (which would kill everyone), the protagonist's goal is to destroy the seal keeping the ancient enemies away, and contrary to expectations going off to a different world does not mean your mundane origin stops caring.Munto was KyotoAnimation's first original project, and has spawned two OVAs in the past. Those are now being expanded to a full series; the OVAs are covered in the first five and a half episodes, but with some updates, so whether you've seen them or not there's not excuse for not watching.Of recent animation, it may have most in common with Magical Girl Lyrical Nanoha; both deliberately subvert expectations of the genre, though not necessarily always the same ones, you will still find interesting, well-animated combat and deep character development in both.
Art Evolution: The battle scenes are always intricate, but the characters seem to become more defined (in terms of design) as the series goes on. Just look at their eyes!
Authority Equals Asskicking: Justified, as the celestials were originally created by their kings as playthings, and it may be impossible to create a celestial with more power than you have yourself. The only none royals that are even stronger are the Outsiders; and nothing gives you more Authority than being in charge of the space-time continuum.
Badass: Any commanding character— Munto, Munto's commanders, Leica, and any time Gass shows up.
Big Damn Heroes: Munto's about to get bisected by an enemy, when the enemy slices in half— surprise! Leica to the rescue!
The Automaton comes in just in time to catch Yumemi and friends when they realize they can't fly just yet.
Book Ends: The Anime pretty much starts with Yumemi walking out the door of her house to go to school and ends pretty much the same. The difference is that in the former she uses an umbrella and in the latter she doesn't showing that she's utterly discarded her former I Just Want to Be Normal status and gained confidence in herself.
Cloud Cuckoo Lander: Yumemi spends half her day looking up. She's actually quite sane and has no problem keeping her mind on reality; it's just that her reality doesn't quite match with everyone else's.
Dynamic Entry: At the beginning, whenever Munto appears to Yumemi he does so in a bigass flash of technicolored light and clouds of smoke. Most likely Justified as it takes a lot of energy to even briefly cross the time-space barrier.
Kazuya and Suzume as well, though interestingly inverted in that Suzume is the one protecting Kazuya, in a way.
AND Munto and Yumemi, though you don't really notice until Ep.7 when they're both standing side to side.
I Just Want to Be Normal: Yumemi is self conscious of her gift to see the floating island and wishes she was like everyone else. When Munto comes to ask for her help she at first refuses, just wanting to live a normal life.
Masquerade: Averted. Though science makes half-hearted attempts at explaining the events away, the celestials appear not to care, and it quickly becomes futile.
Nice Job Breaking It, Hero: Yumemi yells "STOP IT!" to Munto's Automaton right when it's about to blast Gntarl... and it listens to her. So Gntarl takes that chance to hack at it again with his sword and grabs Ichiko and Suzume. NICE ONE.
Older Than They Look: Suzume looks like she's still grade school but is stated to be 13 when the series starts and is most likely fifteen when it ends.
One-Man Army: Gass. There are several battles in which he takes on entire armies by himself.
Munto as well. Considering what else has been shown, being a One-Man Army is part and parcel of being one of the Heavenly Kings.
Only Child Syndrome: In the upper world. Actually, there are only two children period - three, if Munto counts. This is because making children would be a waste of energy that would cause the world to end sooner. Also, don't you think bringing children into such a world is a bit.. evil?
Screw Destiny: Strangely enough, Munto and Yumemi's Destiny as The Chosen Ones is to do this, changing the foretold future of destruction for both their worlds. Ryuely lampshades this early on and when Yumemi brings Ichiko and Suzume to the Heavenly Lands.
Sealed Evil in a Can: Us. The celestials are quite surprised at what has become of the descendants of their ground-dwelling counterparts.
Sequel Hook: A minor one at the end of the Anime: there's a distortion in space left over from Gass's Heroic Sacrifice, the Masquerade is firmly broken with the Humans and Heavenly Beings opening talks, and Munto has run off to spend time with Yumemi while Ryuely makes vague remarks that sound like a prediction.
Ship Tease: A little between Ichiko and Takashi, plenty with Yumemi and Munto.
Shut Up, Hannibal!: When Gridori has Munto under his grasp while gloating, Munto smirks. Gridori snaps, "What are you laughing at—" and Munto punches his face off!
Spell My Name with an "S": Gass, Gas, Gasu...it is also possibly suppose to be Geas (which is pronounced "Gas") as it would fit his status as the Outsider.
Spoiler Opening: The opening to the Anime; after the first few seconds, it trails into things that are covered in the second half of the series.
The ending is worse in a way as it shows things that take place after the series....maybe.
Taking You with Me: After Gass grabs Gridori's neck in Gridori vs. Munto's fight, he says, "I'm going to take him away, Munto." And then he wipes them both out of existence with his runes.