Bound to the Cursed Billionaire

Evelyn carries an old seal and will die if she does not find her twin flame before she turns twenty. She is close to that point when she pulls the billionaire Alexander out of a car crash that was set by a curse, and she recognizes him as the one she has been looking for. His life force is what holds her seal together. His legs are locked by a dark blood curse, so he cannot walk. Evelyn proposes an arrangement that keeps her at his side. Each is using the other at first. They work on breaking the curse on his legs and start uncovering what his family has been doing. Her aunt has gone into black magic and his uncle wants the estate, and the two of them close in on Evelyn and Alexander. What began as an arrangement has become love by then, and Evelyn uses it as the weapon she fights with.