From the introduction:
Welcome to Archanea, jumper. It’s a fantasy land, of course. Pegasus knights dot the clouds, their white bodies possibly mistaken for clouds as they flap. Or maybe you see wyvern knights? Regardless, this is a fantasy world, but one embroiled in complete war. Peace will be difficult to find here, at least for your first few years. You’ll probably survive. You’re a strong one.
The origin of this conflict begins in dragons, and it is through the death of a dragon where it is fated to end.