Midway through reading this. I figured this is just another Twilight/FiftyShades of Grey styled harlequin romance. In the general sense that the guy's role in this is to be the male yandere-lite, deeply in love with the MC, dedicated to her happiness, with an excessive amount of power, wealth and a dark edge to get the tinglies because it sells better, a good reminder that being horny is a shared trait among all humans though also too early to tell if he's actually capable of being dangerous or if he's secretely completely harmless. If the latter though, than possibly being just edgy enough to not truly be threatening but be edgy enough to get the kyaas out of some readers.
In effect, this is shaping up to be a very generic shoujo. Again, just another WcDonald Big Mac Shoujo Flavored. She's going to delay accepting her feelings, we may or may not have more romantic candidates come into the fold to create oooh tension suspense will she won't she dramaaaaa.
It really isn't that much more different from other "And I married the cold prince/viscount/duke/lord/villain" stories but secret surprise the guy is actually a sweetheart but no there is conflict in the way of her accepting she is madly in love with him and let's explore that for twenty chapters until they decide to begin trying to date and maybe they can hold hands.
Basically, very stereotypical start. Of course they could go the accelerated route and we can move on to actually forming the relationship proper, but a lot of these stories hinges on the drama. And then there's the eventual time bomb that she's a body double. That'll cause a stir in societal circles. She'll either be threatened with ostracization of some sort or she'll already have all the soft power to turn it around on the girl who originally summoned her. If that element of the story ever pops up that is, there's also a chance the author never brings it up again.
Again, early judgment. But it definitely has that typical WcDonald taste and feel. Very by the books, very mass produced, but let's see if there's at least a good sauce or maybe the combo meal comes with a milkshake and tater tots instead of the typical soda/cola and fries.