Sister Lover was a Japanese manga about the love story between the protagonist and his half-sister. The ending of the manga had not been decided yet because the storyline had not yet ended. Some readers and the media speculated that the manga might usher in a happy ending where the protagonist and his half-sister could find their own happiness. However, these speculations were just speculations. The details of the ending of the manga would only be known after the work was completed.
The Manslaughter was a crime film produced by Chen Sicheng and directed by Covent. The film was adapted from the Indian film "The Manslaughter of the Heavens" and its sequel "Competition 2." The story was about how his father used the anti-reconnaissance techniques he learned in the movie to fight the police in order to protect his family. The movie was released in China in 2022.
Well, it seems the warrior had some sort of conflict with the hero and his lover. Maybe he knew a secret that could expose them, and that's why they got rid of him.