Monster Duke’s Daughter

she was cut off from the world until she was 5 years old and she was taken in by her father the ‘monster duke’. one day, i sneaked into father’s study without anybody knowing and discovered a strange book… what’s up with the content? i will die because of a sickness? then, are you treating your foster daughter well? in the end, i’ll die because i’m sick but it won’t happen before that! then… i will do whatever i want! the monster duke’s daughter