DANNA-SAMA WA TSUMA NO WATASHI YORI OSANANAJIMI NO KATA GA TAISETSU NA YOU DESU

Cecilia, a count's daughter, achieves her dream of marrying her beloved Ralph and joining the marquis' household. But on her wedding day, Ralph announces that his childhood friend Angela will be living with them. Though Cecilia initially accepts this arrangement, she begins to distrust the selfish Angela, Ralph, and her servants who prioritize her... Her newlywed life becomes difficult, and Cecilia finally decides to escape from Ralph's house, but... !? (Source: AlphaPolis, translated) — Description from AniList community (anilist.co).