Otsubone Reijou to Shiyuka no Kisetsu: Reitetsu Saishou-sama no Okazari no Tsuma ni Natta Hazu ga, Dekiaisareteimasu

After a broken engagement leaves her past the conventional age for marriage, Alerila becomes the subject of quiet whispers, earning the unkind moniker of the "official lady" behind her back. Despite the rumors, she dedicates herself to her work, serving diligently as the trusted right hand to Marquis Easteria Wegmund, a man widely known throughout society as the cold-hearted Prime Minister. Her strictly professional world is upended when the Prime Minister unexpectedly proposes to her while they are on duty. Well aware of the circulating gossip that he harbors feelings for another woman, Alerila carefully weighs her circumstances. Between her family's modest social standing and her current position as an unmarried administrative officer, she logically concludes that his proposal is not born of romance, but rather a practical arrangement. Believing he is asking her to become his wife in name only, she accepts the engagement to enter into a contract marriage. What follows is the beginning of a seemingly businesslike married life alongside the stoic Prime Minister. However, the purely transactional union Alerila anticipated may hold unexpected warmth, setting the stage for a relationship that defies her careful assumptions.