Read Grand Duke, It Was A Mistake! Manga:
I accidentally kidnapped the grand duke I have a one-sided love for! I ended up accepting the grand duke's proposal to have a contractual relationship in return for fixing this issue, but……. “Vivian. May I kiss you?” Huh? Are we kissing as soon as we started dating? “We'll kiss, then we'll take things further, and then let's get married, Vivian.” …&h more.. ellip;I'm in big trouble. I don't think the grand duke is in his right mind……! Is this relationship really okay? It Was a Mistake, Grand Duke!