Genre: Romance, Comedy, Fantasy, Slice of Life
Informations: Focused mainly on romance, Adult Relation
Alternative Name: It was a mistake, grand duke!
Synopsis: 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." ......I'm in big trouble. I don't think the grand duke is in his right mind......! Is this relationship really okay?
Overall, 7.5/10: Grand Duke, it was a mistake! is well liked because of its fluffy content. After having the MC's murdered, betrayed, abused, etc...!< it's so nice to just have a cute fluffy romance. The plot itself is really unique and even if at the beginning, I also thought that the grand duke wasn't in his right mind, it all make sense after reading further. It starts off pretty weirdly, but it's what makes this story so loveable.