The artificial human Wen Yue met the man he loved most in his life when he was 14 years old. During their tit-for-tat confrontation, they developed feelings for each other (they were adults at this time). Wen Yue turned into a mermaid, and they were always on opposite sides.
Wen Yue: A little arrogant little cat
Jiang Yan: The noble young master who cuts white and black
Purpose: Break this world and find the real you