Aijin wo Kakou Reitetsu na Hakushaku to no Tenkeiteki na Seiryaku Kekkon, Soshite Kiraware kara no Dekiai, Sono Ketsumatsu.

A man seeking status and a woman seeking financial support. It was supposed to be a loveless, arranged marriage. But Renando falls in love with his wife, Elise, who is pure and kind to everyone. The two begin a blissful married life, but this story doesn't have a happy ending...

(Source: Kadokawa, translated)