Nonsense Translator: I Use My Words to Save My Ancestors

After inheriting the shop, the protagonist discovers the "ghost IOU" left by his grandfather, and needs to repay 37 "favor debts" owed to the underworld for his grandfather. Each debt corresponds to a supernatural event (such as helping a drowned ghost find his lost wedding shoes, passing down the last words to future generations for a dead ghost in war). In the process, he reveals the secret that his grandfather was once a "debt agent in the underworld", and finally prevents the debt collectors from the underworld from demolishing the old house in the underworld.