Reincarnated as a Nine-Tailed Fox, Turned into a Royal Sister and a Beast Master

[Reverse beast master training + single female protagonist + system + mutual favor] Shengdong traveled to a world of beast control, transformed into a nine-tailed fox, and was still the young master of the demon clan! Then I learned that the demon clan was exterminated... What's even worse is that as a beast master, he actually awakened the beast master system... Fortunately, the system is still humane. Let him find a beast master as a target, make her stronger, and get rewards! After some searching, Shengdong finally found the overbearing royal sister Cheng Hanxia as his target. Since then, he has been favored by this eldest lady, and he is arrogant and domineering! It doesn't matter if you get into trouble or cause trouble. If someone provokes you, you will do it! Anyway, Han Xia is carrying it! "Don't you know that it depends on the owner to kill a fox?" Cheng Hanxia wants to raise other spiritual beasts? No! "Scumbag, have you forgotten what you said when you brought me home?" After turning into a human form, a beautiful woman confessed her love to him because he was too handsome? "Master, put the knife away first!" … As time went by, Shengdong found that he was becoming more and more skilled as a pet, and his domineering master became less and less like a royal sister... "It's midwinter, I'm cold, please transform and let me be your pillow!" "Please, I am the young master of the demon tribe, the most powerful demon beast in the world! I want you to be a pillow?! Okay, let's change!"