"Kimi wo Aisuru Ki wa Nai" to Itta Jiki Koushaku-sama ga Nazeka Dekiai shitekimasu

Elsa, daughter of a fallen aristocrat, receives a marriage proposal from Julius, an elite aristocrat. "Why would such a noble man marry me?" Elsa was perplexed, but after the wedding, Julius, who until then had been kind and gentle, changed his mind! (Source: Flex Comix, translated)