Yamijishi Hakushaku no Saikon Jijou
闇獅子伯爵の再婚事情
A young woman from a poor noble family is selected as the second wife of an elderly earl from a distant province. Traveling to her new home, she expects hardship but instead finds a young, attractive earl with an unusual lion companion. The earl, who remains eternally youthful due to a demonic presence, proposes a marriage that is only formal on paper.