Akuyaku Dorei no Goshujin-Sama ni Narimashita

A person awakens inside the story "The Treacherous Sorcerer" as a minor character fated to be killed by Kian, the story's main antagonist. In the original narrative, Kian kills all the nobles in the empire, including this character. To avoid this fate, they must prevent Kian from following his violent path. Kian endured a difficult past, so the character decides to nurture and care for him to prevent him from becoming a ruthless villain. After rescuing Kian from a slave market, he becomes fixated on them. The character now faces the challenge of protecting both Kian and themselves from a tragic outcome.