In the four realms of heaven, Ling Yun, the young master of the North Realm, has single-handedly become the "devil king" of the entire Tian Realm school - stealing elixirs, playing tricks on his classmates, robbing magic weapons, beating the young master, teasing the fairy master, and peeping at the fairies bathing. He has committed many evil deeds but no one can stop him, just because he has a strong biological mother Su Qingyao who protects her children to the extreme, and a father who is the helpless and conniving ruler of the North Realm.
The immortals were angry but dared not speak out, until a fairy boy Ling Yue entered school and everything turned around. No one thought that this plainly dressed, taciturn girl could easily crush the arrogant Ling Yun, beat him into submission, and turn him from a "devil incarnate" into an inseparable "follower."
But as Ling Yue's strength becomes more and more dazzling, a secret that has been hidden for thousands of years gradually comes to light - she is no ordinary fairy child, but the daughter of Su Qingyao's biological sister, Su Qingxue. When the naughty young master meets the cold-blooded girl, when ignorant emotions collide with the taboo of blood, this fairyland farce intertwined with laughter and tears, rebellion and growth has just begun.
Who would have thought that the demon king who once stirred up chaos in the heaven would eventually become his sister's "exclusive bodyguard". In the process of practicing magic and entangled life experiences, he would lose his childishness and learn to take responsibility.
