My Master Has Something Wrong with His Head

The carefree Immortal of Wangqing Peak, a peak of the Xianling Sect, spent three hundred years setting an example as a master. He devoted himself to driving his eldest disciple into demonic cultivation, extracting his second disciple's soul to refine a Nine-Turn Tribulation-Transcending Pill, and planning to force his youngest disciple to become his cultivation furnace.

Fu Qingshan, the youngest disciple of Wangqing Peak, thought his master had something wrong with his head. When he was three and nearly starved to death on the street, an immortal descended from the heavens. As he held Fu Qingshan and fed him flatbread, he was shrieking inwardly: This kid is so cute! What kind of beastly System is this? One day, it's actually going to make me hurt him!

This sort of thing kept happening over and over for three hundred years. His master, who clearly had something wrong with his head, would “torment” his disciples while acting out all kinds of overly lively little dramas in his mind.

Fu Qingshan: So his master doesn't even know he has the bloodline of the sacred beast Di Ting?

* Master-disciple romance, younger gong, transmigrate into a book System story with the shou, reborn immortal, scheming gong

* It's basically a transmigrate into a book System story, but seen from the perspective of a native of that world

* I came up with the premise myself, but I don't know if anyone's written something similar before. Please don't be weird in the comments.

Theme: See past false appearances and fall in love with someone's true soul