[Altered setting; explanations may be confusing. Starts with KO One 3, blends in the first sixteen episodes of KO One 2 for some everyday-life scenes. Most of the setting references KO One 1, 2, and 3, The X-Family, and K.O.3an Guo, with the Dragon Raja power framework added in.]
If you think of this world as a sandwich...
"I know, heaven, earth, and humanity!"
"Wrong! It's the Dragon Realm, the Demon Realm, and the Twelve Temporal Dimensions. The demons are like the sauce in the middle of the sandwich, constantly seeping into the Dragon Clan and the Twelve Temporal Dimensions."
"Then why don't we team up with the Dragon Clan and wipe out the demons?"
"Wang Dadong, you're far too innocent. You have to understand that between our Twelve Temporal Dimensions and the Dragon Realm lies a boundless Demon Realm, like an endless sea. No survivor has ever made it to the other shore alive."
Night fell. A strange ripple distorted the night sky, and a figure came crashing down onto the beach.