After I Transmigrated into a Book, I Raised a Violent Antagonist

Blurb

Su Yao transmigrates into a xianxia novel as a cannon-fodder supporting character. She has a lowly status as an outer disciple, responsible for sweeping the steps and courtyards and doing odd jobs every day. She's always covered in dust, and no one is willing to talk to her.

One day, she sees a few disciples return with a cage. Inside is a wounded little white cat.

The steward complains that the cat is too small to be worth eating.

After much deliberation, Su Yao can't help using all her spirit stones to buy the kitten.

Under her care, the kitten gradually recovers. It has a sweet, endearing meow, and it's obedient and affectionate.

With the kitten by her side, Su Yao starts training hard. She plans to buy it a Spirit-Awakening Pill someday so it can cultivate as a demon and live a few more years.

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When Pei Yao was young, he had the bloodline of the Demon Emperor. But because he was half human and half demon, he wasn't allowed to cultivate. His biological father considered him a disgrace, and his biological mother saw him as a monster. He endured abuse from demons and humiliation from humans.

As an adult, Pei Yao is cruel, bloodthirsty, and ruthless. He takes control of the demon realm, slaughters the occupants of three mountains and seventy-two caves, and cuts his way through the six great sects of the human realm. In the end, he dies alongside the Son of Destiny.

Pei Yao never expected to return to the time when he was young and had just entered the human realm. This time, he intends to go on another killing spree, but then he meets someone interesting.

He carefully keeps his claws and fangs in check, afraid of frightening the pretty young woman.

An innocent, adorable girl who loves little animals x a violent villain who acts soft and cute in front of the heroine but is actually a great demon king.

Theme: Be an independent person.