Normal version:
"The loan feels good for a while, but I regret paying it off!!!" Demon King's apprentice Qianla said to the system Madoka while wiping his tears.
All because he asked "Can I get a loan?" Before changing jobs. Almost all of Gaira's endless life was spent on the long road of paying off debts, and the big thing he bought was the "Immortal Body (Perfect Edition)".
In order to get rid of the word "apprentice" as soon as possible and become a veritable demon king, Gaila set his sights on thousands of worlds...
Serious version:
His body was hung on the gallows for three days, eaten by crows, and thrown into the wilderness to be eaten by wild dogs.
He once resented everyone - executioners, judges, servants of gods, friends, neighbors, parents, brothers...
He finally discovered that he was just a "cannon fodder" among many people in their long and glorious life.
He abandoned the name he used to have as a human being, longing for immortality and an immortal soul... "If you are willing to pay a sufficient price, please call me. My name is the Demon King Qianla."
Intention: Get rid of inferiority and despair, and you will find that you have always been the most beautiful scenery in the eyes of others.