Mare is a normal poor girl in a country where the rich and powerful have silver blood and have a special power. But she shows she has a power too even she is a red-blooded girl, so the royalty decides to make her a royal fiancee. 
 The plot made me feel either all the characters are stupid or just the MC and her side are. So we got the love triangle or maybe square. We got the the mean girl surrounded by other not really nice girls. Everyone else seem to find special the MC even though I don't know why. Just because she isn't mean maybe. Only incredibly selfish. 
 The writing is not bad. I liked the first chapter before I could see things that hardly made sense for me like what kind of person decides to recruit for a normal job a thief he has just met trying to steal him? Why deciding to make nontransparent a wall is seen as hiding and not wanting some privacy? 
 I nearly DNFed before the middle and it was harder towards the end because the story was worse for me.