If the Heroine Wants My Fiancé, I'll Marry a Yandere Villain Instead!

"You're being tormented? In that case, let me be the one to adore you!!" I reincarnated as Cynthia, a wicked noblewoman from a dating sim, and now the heroine is trying to steal my fiancé. If she wants him, I'm happy to cut ties and find someone new! Oh my, perhaps the yandere character named Siraiya (the third son of a duke), who's known for being an evil nobleman himself, would be a better match? Yes, he's exactly what I'm looking for! "You're the one I want to marry!" Will the villainess's love save the villainous nobleman? Find out in this reverse Cinderella tale! (Source: Cross Infinite World)