Zense Majutsushi Danchou Datta Watashi, "Anata wo Aisuru Koto wa Nai" to Itta Otto ga, Katsute no Buka

"One more time...!! Let me redo our wedding ceremony!!!" Verbena, the head of a mage squad, perished in the prior war. Gil, her surviving subordinate, is determined to devote his remaining lifespan to pining for her. However, Verbena has been reincarnated as Aurelia, the daughter of the marquis of a rural duchy, and is exulting in her new life. Aurelia, who retains memories of her prior life, is arranged by her father to marry Gil, who is now a national hero and the mage-Count of Lothroy. Gil, unaware that on the inside she's the same woman he first loved, tells her, "Let's have a white wedding." This is the discrepant love story of a man with a complicated first love and a cheerful reincarnated girl. (Source: SB Creative, translated)