Those Years I Was an Assassin

Three years ago, Jie Yan's younger sister was shot dead by a mysterious stranger, and his father also vanished under strange circumstances. Just as Jie Yan was losing all hope in life, a voice asked:

"Do you want to become an assassin?"

A mysterious organization invited Jie Yan to join.

He became a cold-blooded killer known as Blood Pupil, immersed himself in baffling cases, and struck down his targets without a trace. As he continued to hone his skills, he embarked on a legendary path of revenge.