Inside a gigantic classroom at Purgatory Corridor Academy that resembled an arena, dazzling spotlights illuminated the four walls.
The classroom was not designed as a typical square. Instead, it had an oval, indoor arena structure, with tiered circular seating like spectator stands rising layer by layer until the highest row nearly touched the ceiling.
By now, half of the fourth class had passed.
At the center of the arena, demons were engaged in a fierce battle.
In the back row of the stands, a brother and sister sat quietly, waiting.
3 hours 30 minutes remaining Task Objective 1: Academy exploration progress above 60%; current progress: 748% ...
They were Silver-rank challengers from the Yarolan Kingdom. They had already suspected that demons might have infiltrated the challengers, and now they were silently watching the changes in the Shadow World's task objectives.
The number seemed to have broken.
At the beginning of the fourth class, the progress had been only 40%. Then it began shooting upward at an absurd rate.
Although the two of them had discovered after exploring the school that, given its size, fully exploring the Teaching Area would definitely result in more than 100% exploration progress,
100% should nevertheless have been the Shadow World's calculation of the maximum amount all challengers could normally explore within twelve hours.
But it had clearly exceeded common sense now.
The number was still jumping every so often and continuing to rise!
The siblings had no idea what was happening!
Everything had still been normal when the third class ended. From the changes in exploration progress, it was easy to tell that all three teams had cleared difficulty-three classrooms, increasing the progress by 18% in total.
After investigating the previous classes, the siblings had also learned some information—an uninvited guest would come