In My Death, I Became My Brother's Regret

When Jing Mo showed demonic powers that was latent in his blood, his brother Jueming was forced to kill him. Jing Mo woke up to find himself reincarnated into the body of the boy Bai Zhu, but there seems to be something… strange about this body, too. Jing Mo wants to run away and hide his identity, but Jueming wants to find his brother's missing body and wouldn't let him go. One wants to hide, the other wants to find the truth, as they become embroiled in a deadly struggle over Bai Zhu's true nature.

(Source: Bilibili, translated)

Note: Chapter count includes 10 extra chapters.