The Hero Who Works Part-Time as an NPC and the Demon King

In the background of an RPG game similar to an imaginary different world, an ordinary boy named Nomor, a brave man who likes food and complains, begins to save the world. Is this going to be a cheesy trio-save-Normal, Cosey-and-Arsen-save-the-world model? Nomor: What is the Demon King? Can you eat it? What's not allowed? So how do I defeat him? Do I use words or complaints... Kexi: Foodie, quit, I am the true brave! Asain: Stop making trouble, the author said that only those who meet the conditions of Demon King and NPC are brave~ Nomore: Then why did I come? Soy sauce? Conception: