Shen Yi died unexpectedly and was chosen by the divine beast Qiubei to become the daughter of the Demon King and complete a mission to reform the villains. Her Demon King father and villainous brothers were all twisted, obsessive, crazed, bloodthirsty, violent yanderes...
Shen Yi: "Can I beat my five rebellious brothers into submission?"
Divine Beast Qiubei: "Be good. You have no demon power at all apart from your beauty. You're a useless weakling, so work on them quietly. Don't rush in recklessly."
Quietly winning over the bloodthirsty Demon King: "Daughter, whatever you like, I'll seize it for you!"
Quietly winning over her yandere second brother: "Little sister, as long as you exist, that's enough for this world. I'll destroy everything else."
Quietly winning over her puppy-like fourth brother: "Little sister, you promised you'd stay with me forever~"
Quietly winning over her sharp-tongued third brother: "You're useless, so just stay behind me and let me protect you."
Quietly winning over her smiling tiger of an eldest brother: "It's fine. You only touched a single hair on my sister's head. You can pay for it with that hand."
Quietly winning over her aloof fifth brother: "If my little sister wants you dead, you'll die. If she wants you alive, then you'll live."
Shen Yi: "Can I win over the male lead now?"
Divine Beast Qiubei: "Sure. Sacrifice your lover to heaven, and your demon power will know no bounds."
Shen Yi: "???"
It's so good! Not sad at all! The Demon King and his five older brothers are so kind, and little Tie'er is so sweet!