Chrome Shelled Regios is set on Earth After the End. There the remaining population survives inside domed, mobile, cities called Regios. These are needed to protect from the horribly polluted atmosphere and giant man-eating Filth Monsters.The series protagonist Layfon Alseif, arrives at the academy city of Zuellni with the intent to leave his past behind him and start over as a general studies student. However, he demonstrates his true abilities saving a girl who got caught up in the destruction of a fight between two military arts students. Despite not wanting to fight he is forced into the military arts department which is used for defense of the city as well as competing in intercity matches for valuable resources.A series of Light Novels that has 4 (Yes, 4!) Manga adaptations, 2 novel spin-offs (a prequel and a sidestory) and an Anime adaption.The novels can be read here.This series provides examples of:
An example of just how absurdly powerful he is, is when he makes a phone call, and has his assistant hold the phone up to his head, for no reason other than he can.
After the End - Earth. Ironically it became the way it is after the UN tired to solve Earth's Energy Crisis due to World War III. It worked at first but then It Got Worse.
Applied Phlebotinum - Selenium. Also, each Regios is run by an electronic fairy.
Authority Equals Asskicking - Nina in the mangas and novels. Which is the reason why she was made the youngest Platoon Captain and leads...
Not in the sense that what is actually being said is bad, though; it's the way they pronounce it, mainly. (Though some of the acting does seem to be getting slightly better over time.)
Blood Knight - Some members of the Heavens Blades just love to fight especially the Queen herself.
Crowning Music of Awesome - The music of the anime is great to listen, even the ending song by the band Chrome Shelled especially the duet versions with the female cast.
Crouching Moron, Hidden Badass - Layfon may look like a weak nice guy but if you ever harm his friends and those he cares, get ready for a painful ass kicking!
Cursed with Awesome - both Felli and Layfon have... mixed feelings about their superpowers
Horde of Alien Locusts - The filth monsters can consume pollutants but humans are the preferred option.
Ice Queen - Felli Loss, lampshaded by the fear normal girls have of her.
I Did What I Had to Do - Layfon's justification for participating in underground matches and attempting to kill the person who was blackmailing him in a Heaven's Blade selection match. Thankfully Nina was able understand and forgive Layfon on what he did. The anime on the other hand she forgave him by the next episodes end.
Katanas Are Just Better - Played straight and subverted. Almost every single character used a weapon other than a katana, and they aren't really being shown as inferior to those (few) that do use katanas. However, the protagonist, Layfon Alseif, who has been using a standard sword the entirety of the series, gets his greatest Crowning Moment of Awesome after fusing two different kinds of Infinity+1 Sword s together. Partially justified in that all of his training focused on katana-using, and it was just a personal vow of repentance that kept him from using it the whole time.
Older than They Look - Shante is actually 20 years old! Queen Synola is more older than she looks but just don't mention that to her if you value your life.
Rebellious Princess - Nina is actually the heir to the city of Sheniebel. But she felt her freedom was restricted by her parents since she wanted to do more to protect people rather than just being the next heir. When her parents wouldn't allow her freedom, she ran away from home to study at Zuellni which her parents in turn disown her.
Serious Business - Conflicts between cities are settled with games of what very strongly resembles capture the flag, which decides whether the opposing cities get to keep the other city's Selenium mines (the source of energy for the cities) or not.
It's also only the Academy Cities that have the capture the flag rules- to hold down the body count. It's implied other city types are more... unrestrained in fighting.
Ship Tease - Layfon and Nina. Layfon and Mayshen. Layfon and Felli. Layfon and Leerin. All of these moments will make you feel Squee.
One of the manga adaptations, Missing Mail, teases Lafon and Felli so very very much.
Show Within a Show - The Legend of Regios segments occasionally end with various members of the cast complaining about the abrupt cut-off and whating to know what happens next.
Supernatural Aid - With a bit of a twist as Layfon has lost his Heaven's Blade, the anime then plays it straight when it is returned and combined with his katana.
Takehito Koyasu - Karian Loss, Student Council President and Felli's older brother.
Unwanted Harem - Layfon, you are one lucky man. You managed to catch the hearts of Felli, Nina, Mayshen and Leerin. Surprisingly, he does have feeling for all of them.
What Could Have Been - Leerin would have been Queen Alsheyra's daughter if her fiance (Leerin's Birth father) had not disappeared and married another woman.