Sek is a cat demon.
No... To be precise, he is the "impure son" born of a human and a cat demon.
Thirty years ago, a large number of monsters escaped from the "". At that time, Seck's mother fell in love with a married man and secretly gave birth to him. However, due to the scuffle, Seck's mother abandoned him, and his father had no choice but to take the illegitimate son back to his family. Because of his special identity and strange appearance: an illegitimate child, because he is not a purebred cat demon and cannot hide his cat ears and tail well, he is discriminated against and treated as a monster. The cold eyes of her biological mother when she abandoned her, the indifferent face of her father, the disgusted face of her stepmother, and the monster-like expressions that people in the village looked at her. At that time, little Seck's eyes were full of despair.