From myanimelist.net
Set in a world where history has taken a slightly different course from the one we're familiar with, K follows the story of a young boy whose life is caught in a psychic war between seven kings.
Ashinaka High School is known for its unique setting: the entire campus is built on an island. Yashiro Isana, aka Shiro, is having lunch with a cat on one of the school rooftops. After his lunch break, Shiro goes on an errand for his classmate Kukuri to prepare for their upcoming school festival, only to be chased by some intimidating-looking men.


I'm afraid of talking too much about this anime, because it's quite easy to spoil it. It is a thirteen episode shounen anime with kings in future japan that have supernatural powers. For instance, they can fight with fire. It's a bit confusing to understand if you're not paying close attention, but I don't think you'll get too lost if you keep following the story. I ended up watching the entire series in a day, and I was thoroughly entertained.