TOUMEI NINGEN NI NATTA WATASHI TO, WATASHI NI KYOUMI GA NAI (HAZU NO) OTTO NO KIMYOU NA SANKAGETSUKAN

Countess Aurelia has been living in silence with her husband, Leclerc, whom she married at the age of 18, for two years. She has adored him ever since she first saw his portrait, but she discovers that Leclerc has a former lover with whom he broke up due to opposition from those around them. Troubled, Aurelia confides in a suspicious fortune teller she happens upon, and is given a mysterious ring... A three-month story depicting how two people who keep missing each other end up becoming a real married couple! (Source: Takeshobo, translated) — Description from AniList community (anilist.co).