Samang Ending-eul Pihaneun Wanbyeokan Plan
사망 엔딩을 피하는 완벽한 플랜
A character is reborn as Sienna Winter, a minor antagonist suffering from a fatal illness, and focuses solely on staying alive. She unintentionally releases a bound demon and enters an unbreakable lifelong agreement. Despite this, her condition remains life-threatening.