Sorry for replying late. About our second potentiallly happening couple, it's the mistress or female lead is serving (she has similar hair colour with our fl) and the black hair lady (he is just cross dressing, soo actually a guy) . I remember seeing how the mistress was comfortably wearing his white shirt and having very intimate gestures together. They are really cute hahaha. Sorry for not naming names, I forgot who they are, so I only recall their faces.
**PLOT SPOILERS
Our female lead will keep on reincarnate until she remembers everything cuz her soul needs time to regenerate soo our poor ml will keep on waiting till chapter 330 where FL, aka the fairy king remembers everything. So yeah, it went from pretending to be a mistress to some fantasy cliche weird time travelling deep ass manhwa. There's also this other dude who is of foreign blood which allows him to have a long life and can do magic stuff ? Idk, but he is sooo adorable. That's in later chapters I believe. I know I sound vague but it's also cuz I read it in another language and then forgot about my comment here.
It's actually chapter 331 at the moment sooooo I'll doubt we'll get there.
P.s. I'm soo into my second couple hahaha