Shironeko Project: Zero Chronicle

The Kingdom of White, which floats above the heavens and is ruled by its queen Iris, and the Kingdom of Black, which lies on barren ground below and is ruled by the King of Darkness, are the two kingdoms that make up the world. Evil forces have recently gathered a lot of strength, endangering the entire globe. Iris has a responsibility to preserve the balance of the planet and combat darkness in her realm because she is the principal representative of the Light. A specific youngster is the last survivor after creatures in the Kingdom of Black completely destroy his community. An armored man named Skeer notices the boy and consoles him as he sobs helplessly. Soon after, Skeer names the boy as his successor before passing away because he sees in him the capacity to alter the status quo in the realm. The youngster then makes a promise to return the world to its true course by rising to become the Prince of Darkness, the successor to the King. Their destinies will converge as Iris and Prince of Darkness each confront the approaching doom the world faces in their own unique ways. Perhaps their relationship will determine the world's fate.