No, I Only Charmed the Princess!
I love that there is no cold/uncaring/extremely tsundere crown prince/royal family here, or at least it only appeared so in the beginning before they got to spend time even a little bit and were still suspicious. Like, yes, MC is the white mage and the crown princess and is important because of that - but they all quickly started caring for her genuinely as a person and a family member (although this is still a work in progress, of course). The crown prince is attracted to her physically for sure, but that's not the reason why he treats her like he does - even before that whole blushing scene, at the dinner table, they rightly include her and make her feel welcome. Again, they genuinely do care for her as a person. Ik this should be the bare minimum, but after so many cold MLs who had to be thawed out this is just. Really nice. And that he honestly shows his care for her! The whole family just warms my heart in so many ways.
Only When the Heavenly Demon Loses His Virginity Will Murim Survive