I can recommend a few novels that fit this format: "Quick Wear: Dark Prince Charming, Please Be Good": The Host wants to attack the Prince Charming, but also make him dark. Let's see how the Host completes this mission. "Quick Crossing: Strategy for the Cosmic Prince Charming": The protagonist has to save the life of cannon fodder and at the same time, he has to conquer the Cosmic Prince Charming. "Quick Wear: A Guide to the Dark Male Lead": The protagonist wants to save the Dark Male Lead and see if the protagonist can succeed in regaining his conscience. "Get Dressed Prince Charming: A Guide to Villain Evolution": The main character wanted to conquer the villain supporting male character. It was hard to say if the supporting male character would eventually become the villain. I hope you like my recommendation. Muah ~