A hilarious combination of the reverse operation of the book girl + the good-for-nothing brother. As a book traveler, the heroine has complete information about the "original plot" and thinks she can crush everyone with spoilers. However, she discovers that the useless senior brother who has the least presence around her is the villain in the original book who betrayed his master, became an enemy of the whole world, and finally died with the protagonist. What's even more frightening is that this senior brother seems to have realized that there is something wrong with the heroine before he awakens, and is testing her at every turn.
