Urenokori Seijo no Shirokatta Hazu no Kekkon ~'Aisareru Hazu ga nai' to Imouto ni Shiitagerareta Ane wa, Toshishita Ou Taishi ni 'Kimi dake ni Subete o Sasagetai' to Dekiai Sarete Shiawase o Tsukamu~

“Will you stay by my side from here on out?” Anna Lischril has been abused by her family since childhood simply because she is the child of a mistress. In a noble society where it is normal to marry around twenty, she is still single at twenty‑eight, enduring her younger sisters jeering at her as a “spinster” and “leftover.” One day, Anna is declared a Saint, a miracle that appears only once every few hundred years. According to the nation’s laws, the Saint must marry the First Prince, so she is sent to become his bride. “If it is you, I want to devote my everything to you.” The fate of Anna, once written off as a “leftover,” now begins to change dramatically. Original Webtoon