This Apprentice Is a Bit Unruly

A new book has been released "My Wife Has a System in the End of the World" "A Guide to Raising a Villain Heroine" Dongfang Bai, who has become immortal, wants to stay in the sect and be a carefree elder. I got a handwritten note by accident, which records the growth history of a villain, the devil, in order to change the ending of being killed by the villain. By mistake, he accepted the villainous Demon King as his apprentice. Unexpectedly, this apprentice was very well-behaved and cute. He didn't look as scary as the handwritten note said, and he was unexpectedly clingy.