Only I Am A Reader - Chapter 423 Urban Fantasy!

Upon meeting the girl who would become her adopted younger sister, the duke’s daughter Christina regained memories of her previous life. Through those memories, she learned that her new sister, Mishuli, was the heroine of a certain story. And though the story depicted a Christina who abused her sister, the real Christina turned into a siscon who spoiled Mishuli to no end.

"There is a thin line between poison and medicine, and I shall make you dance on it!"

On a normal boring day, a message appears, inviting him to a Tutorial.