
I'm reading the novel now, and I haven't seen any signs of a male lead. We meet the FL's previous husband from Japan, but he's a ghost and passes on to be reborn.
But I'm only just starting chapter 108 (of the current 631 chapters), so I'm not very far in the novel. It would be interesting if there was romance, but the FL's been calling herself a grandma for the past 100+ chapters, so I don't know. ╮( ̄▽ ̄)╭

Okay, so I just finished skimming Part Two of the novel, and the ML is definitely not the second prince; their engagement just got annulled, and he's been thoroughly disillusioned by Sienna, so he's taken her off the list of potential fiancées. (Sienna is outraged, because drama queen.)
The shady nurse turns out to be the first prince in disguise (the former-fiancés older half-brother), and he's actually a nice guy who feels indebted to the FL, because she broke the curse he was under when she was still a toddler (in her SLEEP, even).
So if this novel's following the usual tropes, the first prince will probably be the ML in the end, but if they're already together in the novel, I haven't reached that part yet. He doesn't even get a POV until Part Three of the novel.
I hope we get another male lead. the current one is worthless