Remember the Terminally Ill Grand Duchess

For Grand Duke Heverus, marriage was nothing more than a means to an end. His union with Leticia, an adopted daughter of a counts family, began just as simply, a one year contractual marriage. But the Grand Duke slowly grew attached to Leticia, and just as he was about to confess his feelings after returning from the battlefield, he was struck with shock.

Leticia had already died from a terminal illness.

Regretting his own indifference, he risked his life and used the power of ancient magic to turn back time. This time, he is determined to save Leticia, to grant her happiness, and so he proposes the contractual marriage once more.

But theres a problem.

Merely watching her isnt enough. He wants her. Forever.