Binbou Reijou wa Noroi no Hakushaku to Kekkon Shitai

Elena has been living in poverty after her family's estate fell on hard times. Amidst her troubles, she was offered a deal: in exchange for financial assistance to keep the estate afloat, she would have to marry the “Cursed Count.” Without hesitation, Elena resolved to marry him for the sake of her family! When she arrived at the mansion, she discovered—

(Source: Square Enix, translated)