After the Substitute Marriage, I Became the Devil's Exclusive Drug Guide

In order to marry the demon god who was rumored to be terminally ill for her sister, she was prepared to be a widow, but found that she was the only medicine to awaken his dormant power and heal the wounds in his soul. From then on, she was locked by the overbearing demon god, starting a period of reverse strategy and top-notch favoring in which "he thought she was redeeming, she thought she was hanging on for dear life".