My Reality Is a Protagonist's Game

"The Demon Realm's great demon lord, Frand, owes 350 million and ran off with his sister-in-law. As his son, I have no choice but to sell off the items in the Demon Lord's Castle to make ends meet. These things used to cost over thirty thousand or twenty thousand, but now everything is just 200!"

"Frand, you heartless beast! I worked so hard to be your son for over a hundred years, and you ran off without a thought for me! Pay me back for raising me! Pay me back!"

"City inspectors, it's that kid! He's pretending to be the Demon Lord's son again, hawking goods and scamming people!"

"Wait! I'm not scamming anyone! I really am the Demon Lord's son!"