Whose Devil Is Fishing in the Countryside?

Three life lessons from the devil Walter: First: Don't admit that you often fly. If you can't catch something, go to the river to catch it. If you can't catch it, go to the market to buy it. If you can't buy it, just steal it. Second: Don't admit that you are single, don't create your own affectionate persona, and stay away from guys who look like troublesome witches. Third: Don't believe what beautiful girls say. The more beautiful the girl, the more likely she is to lie. Fourth: No, why do you write more and more? Excerpted from the diary of Walter, the last demon king. "Wait, when did I write a diary? What do you mean by admitting that this is my diary?" —— Walter, the last Demon King, originally lived in seclusion in the countryside of the Kingdom of Dolan, living a leisurely life of fishing every day, until one day, a witch lady who seemed to have malicious intentions came to visit with a scarred elf in distress. "Walter, do you want a maid?" Hello? Why is everything in such chaos?