The Sand-Brained Castle Lord's Survival Diary

I was living the good life, hanging out with friends and enjoying myself, when one day I transmigrated to a dynasty that had never existed in any book. The times may be rough, but at least... there are plenty of handsome men. What? They all want me to join them in a rebellion? Can’t I just be a silly castle lord who quietly enjoys life and occasionally acts cute~~? A story about a bunch of friends raising a banner and stirring up trouble. One-on-one romance. The male lead has plenty of ideas, but he only likes one person (that’s right, the prettiest one). Theme: Should we do it or not?