Alkaloid no Hanayome

From Comic Days: Romelia, a lonely girl, and Kuturi, a young high-ranking soldier, are solemnly married in the presence of God. What they share, however, is not "married love," but the "unbearable fate" they have mutually borne. Began as a one-shot published on Morning Two Web in September 2022. Serialization began in April 2023.