My Little Sister Is the Demon Lord!

After their parents' sudden passing, Gyeonwoo finds himself in the role of caregiver to his younger sister, who harbors a startling secret—she's the Demon Lord with plans for world domination! Undeterred, Gyeonwoo is committed to nurturing his sister with love and guidance. Join them in this unique tale as they navigate everyday life amid their extraordinary circumstances. (Source: Webtoon Entertainment)