Western fantasy magic background.
Jia San didn't believe in love, let alone eternity, so he tied his mount with a contract and gave it a time limit.
His Majesty's magic research went wrong (he got lost) and turned his body into a monster. Who would have thought that a fool would forcibly contract his body as a mount? How could this be tolerated? All kinds of lessons must be given in turn!
Plus Three: Who is this stupid bird emperor? Why do you bother him when you have nothing to do? And why do you know so much about him?
Conception: