Lucia and Phil go to the wedding where everyone is in awe of/fearful of Phil who puts the villains in their place instead of letting them humiliate Lucia. Later Lucia finds out Phil is actually the prince, he proposes, and she accepts. The end. No real conflict, drama, or other twists involved.

Not a deal breaker, but it does dampen things: There comes an age when every woman stops thinking Cinderella is a wildly romantic ideal, and instead starts worrying about her.

That auntie-like worry is evoked in this story.

This is partly due to the FL's age and sheltered upbringing. She is only 18, and hasn't really been anywhere but the farm. This vs. A worldly member of the royal family, who grew up in the Capital, traveled extensively, acted as commander of an army during a war, and is about 7+ years older than her.

And largely to do with the ML's escalation from zero to a thousand in under a second, and his steamrolling.

While yes, they have known each other for years in a sibling-esque fashion, after two dates, (where the FL didn't even view things as romantic dates, but rather as a nice, more worldly family friend acting in a mentor-ly way towards her, the country bumpkin little sister) the ML immediately jumps to declaring he will give up his birthright, defy the king, and abscond from the army, all to marry the teenaged FL, who is still in the "wait, your real identity is what?" stage.

The FL and her own brother are quite practical about the realities of a match with such wide class differences, but the ML quickly descends into frantic destined fantasy mode, and turns into a clingy, whiny, octopus who is desperate to pretend it will all work out due to the Power of LoveTM. When the FL protests that she cannot accept, he sends knights to monitor and "protect" her, also a read flag, and puts her in the line of fire with his very powerful older brother.

The two are wonderful matches, personality-wise, but one can't help the Auntie-worry that she is way, way too young and inexperienced to understand the repercussions and consequences of letting herself get swept away by a grown man with too much money, power, and strings for her to handle, and that both of them need to wait several years and calm down.