Not only is this plotline bad, it was written in the most contrived way posible.
The prince, a quasi-hero wants a quasi-hero for his country military.
(Which arent even rare, king wives, horse teacher that hasnt appeared in a while, that random sex offender that Eliza has in her lab) and wants a wife in one go.
Little electra complex is jealous of the prince looking into Earnest.
But what was even her relation with Blade as to ask him to dance? In fact, for it to happen, every girl simultaneously had to give space instead of being over Blade as usual.
Blade dances with her in dad mode and Earnest gets jealous of an 11 year old.
Earnest just leads the prince to make Blade jealous, which instead of his usual behavior just backs off for no reason.
And then the prince says that he intended to recruit her but wants her genuinly as a wife. She notices that she is doing something really wrong, and the prince kinda coerces her, but she could have rejected the marriage and still take the job.
Blade doednt know what marriage is but still does nothing for no reason.
And then the Earnest is equal to 12 students is ridiculous.
She is exactly equal to Lumilia, weaker than Ku, 1ONO, and Maria, and Jessica is able to hurt Blade when they arent.
In fact, Earnest isnt even worth 2 Clays.
And over her accepting the marriage, it would have some weight, if she actually considered it, they could have a parallel between Blade toy ring and the one he gives, as from her perspective, Blade is technically a nobody.
Just dont make the little girl end up with the prince please