Jin Yu Da Lao Ta Lun Xian Le

In order to treat her sister's illness, Xu Yan Qing sold her virginity at a high price and committed herself to a strange man, Yu Zhi. A year later, she met Yu Zhi again at a party with her pursuer Song Jin's friends. He recognized her and pushed her against the wall. Xu Yan Qing fled in panic and returned to the box, but Song Jin told her that only Yu Zhi had the medicine that could save her sister. She lowered her status and begged for medicine, but Yu Zhi made things difficult for her and was determined to pull her back to the madness of the night she fell.
(Source: Chinese = Weibo || Translation = Google Translate)
~~ Adapted from the web novel "Jin Yu Da Lao Ta Lun Xian Len" (禁欲大佬他沦陷了) by Gu Xiao Yi (顾小易)