The Lost Records of the Six Realms

What does it feel like to wake up with amnesia? An empty mind, nothing left to remember. And there really is someone who has forgotten everything, yet no one notices. Oh, I'm on Floating Sky Mountain. Oh, I have eight little disciples gathered around me, calling me Master. Oh, I might as well take in the little ones on my roster, too. Oh, I have seven junior brothers and sisters, and one senior brother. ?? Wait, am I being a little too calm about this? ? What makes a demon, and what makes an immortal? How can living beings caught between the two survive?