Locked Up by My Mad Dog

After dying and being reborn as Elizabeth, a character from a dark fantasy novel, the new “Elizabeth” begins to navigate her new life. Set to be married to the empire’s crown prince, the new Elizabeth can’t believe her luck. But just as she’s getting ready for a life on easy street, the dark secrets of the previous “Elizabeth” begin to come to light. Learning that Elizabeth keeps a slave known as her “dog,” Elizabeth feels she should set him free. But little does she know that pulling on this thread will unravel far more than she could ever imagine.

(Source: WEBTOON)