The story
Everything he touches burns. She does not.
Beast King Elden carries a lethal lightning curse, and Vera is the only living thing that can take his touch, so he holds her mother hostage and forces the marriage. She resents him and still catches the truth of him, healing her, shielding her, going to pieces when she prays for him barefoot through brambles. The curse breaks with consummation and the backlash would kill her, so he makes an antidote, and the villainess Lia swaps it for poison. Six years he mourns at her grave, and six years she is alive in the slums with twins.