Binbou Reijou wa Noroi no Hakushaku to Kekkon shitai

Elena is living in poverty due to financial difficulties in her viscounty. In exchange for assisting with the business, she is offered the condition of marrying the "Cursed Count." For the sake of her family, Elena decides to accept the marriage without hesitation! When she arrives at the mansion, she finds...

(Source: Square Enix, translated)