You're Saying I Was the Persecuted, Terminally Ill Grand Duchess? ...Me?

I was blowing my top after my doctoral dissertation got rejected for the final time, then fell asleep... ...and woke up at a wedding. Apparently, I'm now 'Renée Céleste.' It feels like I've been transmigrated into some romance fantasy novel, but I have no idea which one... "Since we're both uncomfortable with this, let's just live quietly as if the other doesn't exist." The husband of the body I transmigrated into, the Grand Duke, said to me. Huh? Live quietly? That's exactly what I wanted! In my small, humble cottage, with the unconditionally supportive 'Ga-Na-Da Maid Squad,' and a transparent(?) dragon I somehow got tangled up with, living a cozy life—one day, on a night with a f...