Spurkey

Reincarnated as Sienna Winter, a minor villain with a terminal illness, her only goal is survival. However, she accidentally awakens a sealed demon and gets trapped in a lifelong contract. But... she's already dying?!

Reborn into a novel as the unawakened Demon King, Tatiana is imprisoned and exploited by demons who use her power for themselves. When her captors are killed by three heroes—Duke Siegfried Orleans, Archmage Kyrios, and High Priest Cesar—she nurses her saviors back to health, and they adopt her! Now, Tatiana is determined to awaken so she can be independent... But with three protective fathers watching her every move, can this 4-year-old keep her secret long enough to become the Demon King?Reborn as a weak 4-year-old demon king, I tricked three heroes into becoming my "dads" to survive. But now they’re fighting over who gets to spend time with me! Even the male lead, meant for the heroine, is obsessed. What’s going on?!