Total Recommendations: 1
These are both school/fantasy/supernatural shows made by Kyoto Animation. Both shows revolve around the concept of high school students with powers in a world where ghosts, yokai, ect. exist . KnK have Spirit World Warriors that hunt Youmu while Phantom World has a hunting-club that hunts Phantoms. Both have epic fighting scenes and have beautiful animation (as expected from KyoAni) While KnK labels itself as a "dark fantasy', Phantom World is more of an ecchi/SoL.