So I'm your first man then?" I've never heard of a story like this!! Marquise Filiera, who witnessed her fiancé, the Crown Prince, cheating on her, suddenly remembers. I've been reincarnated as the villainess in a manga!? But unlike the manga, it's been altered into a world with loose morals where cheating, adultery, and casual sex are commonplace!!?? There's no way a Japanese person from my previous life could adapt to such values! With that, she declares to the Crown Prince that she's breaking off their engagement. Cheated on, tripping down the stairs and spraining her ankle, and to top it all off, she can't use magic—it's just one misfortune after another... That's when she meets Sherald, a rival character in the original story. The top archmage of the magic tower, even more high-spec than the Crown Prince, why is he here? Kind Sherald heals her ankle with magic, but... her body suddenly becomes hot, and she can't stand the throbbing deep inside! "It's alright, this will calm your fever down right away." The man she just met gives her a treatment, but then he ejaculates inside her...!?