Bato

S-Class Spirit Master's Taming Diary, S at manhwawebsiteAs a Spirit Messenger, I was reincarnated in a monster-infested earth. But here, there is no such thing as a spirit. Monsters? Dungeon? Those sorts of things are for hunters to solve, right?

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?!