I recommend you a novel called " A Guide to Quickly Wearing: Villain, Please Don't Be Dark ". Although it is an ancient romance novel, there is a plot that fits what you mentioned. The plot of the novel was about the protagonist Ning Ning committing suicide by jumping off a building and being kidnapped by the Lushu Beast Yuanyuan. One of the missions was to save the girl who was chosen as the deer and let her live happily again. I hope you will like this novel.