Joey never imagined that he, a top student in the eyes of others, could fail the CET-4 exam three times. It's really embarrassing to be thrown into grandma's house. It wasn't until she met him that she realized that it was all a conspiracy. "Tell me, who are you?" "I am the fourth-level king who is here to save you." "..." But I have only heard of the Jade Emperor and the Queen Mother. The story of a math master who is a scumbag in English and a cute foodie who is a Level 4 student.