KONYAKUSHA KARA "HEIMIN WO AIJIN NI SHITAI" TO IWARETA WATASHI: OKAZARI NO TSUMA WA IYANODE "SHINJITSU NO AI" TOTOMONI HAMETSU SASEMASU

"I'll make you and your unborn child happy." After hearing about my fiancé's betrayal, I walk off to a feast of revenge! The Duke's daughter, Evelyn, is troubled by the coldness of her fiance, Bernard. When it turns out that the cause is an affair with a commoner woman, she smiles and hides her true feelings, while beginning a plan to send them both to hell...! With the support of Crown Prince Frederick, who dotes on Evelyn, she finally finds true love...!? — Description from AniList community (anilist.co).