Same. I thought I knew what was happening but I’ve been confused the last couple of chapters. Like, why did he expect the ml to smell like wood and was surprised it was musk? Does he only remember (wood or musk?) from France? Or does he remember one of the scents from his time as a rut partner too? And, er, why are they suddenly happy? Is that it - they together now?
Hi! I’m gonna explain a little, the manhwa kinda don’t explain or just say things in the passing so it’s easy to get lost.
First, ji an do not know in the beginning that ml was his rut partner, because every time they sleep together, ji an was wearing a blindfold and the room was always pitch black, so the only thing he remember clearly was the heavy Musk pheromones. Now, when he meet the ml he only can smell wood, because the ml use perfume and air fresheners with wood scent to camouflage his pheromones, in the novel they explain that, going around parading your pheromones (alpha or omega) it’s rude (remember when haneul released his pheromones in the car and the ml opened the window, it’s because it’s rude to release your pheromones and the ml was annoyed by them)
So, since mc remembered that his rut partner smelled like musk and the only this he remembers from Paris it’s the same musk scent so he was sure the ml was neither his rut partner nor the one from Paris. So here, when they had sex and the ml released his pheromones (musk) the mc realized that he was the one from Paris and his rut partner.

Can someone just explain the plot to me so far please, I'm lost and don't want to go back and re read