😋I recommend to you " Cool in the Doomsday ". This is a sci-fi-doomsday crisis novel. It tells the story of a character transmigrating to the doomsday and has a system. The only requirement of the system is to make the protagonist feel good! The main character was constantly enjoying himself in the apocalypse, fighting monsters, being the emperor, and living the life he wanted. In addition, this book had some other nicknames, such as " I'm a Man of Principles "," I'm Not a Virgin Mary ", etc. I hope you like my recommendation.😗