Lang Xiaojie He Ta De Huli Meimei

The setting is a modern world populated with beast-people, ruled by the law of the jungle. Twenty-year-old Yu Wenxi is a wolf-woman who stands at the top of the food chain. She fought her way to the top with her bare hands with a fierce attitude and no respect for the weak. Until one day, when her stepsister dumped a fox cub on her. From then on, the wild wolf turned into a gentle guard dog. She vowed to raise the crybaby cub to become a good student and a good citizen! However, the fox-girl's good-girl appearance hides a dark side.

Little Fox: "Sister, I've been a good girl, can you… do something nice for me?" (Blinking back tears)

Now that the crybaby fox cub is all grown up, her first order of business is to find and capture the gray wolf that abandoned her. She'll chain that wolf to her territory, and never let her escape…

(Source: Bilibili, translated)