In Purgatory Corridor Academy, a gigantic classroom resembling an arena, bright spotlights lit up the four walls.
This classroom was not designed in the typical square shape, rather it bore the structural semblance of an oval-shaped arena. The circular seats, akin to those of an audience, stacked up layer upon layer, with the highest row nearly touching the ceiling.
At this point, half of the fourth class period had passed.
In the center of the arena, a demon was engaged in an intense battle.
Quietly sitting and waiting in the back row of the audience were a pair of siblings.
[Time remaining: 3 hours and 30 minutes]
[Task 1: Academy exploration must exceed 60%, current progress 748%]
[...]
They were silver-level challengers from the Arolan Kingdom. Earlier, there had been suspicions about the presence of the Demon Race among the challengers. Now, they silently watched as the task objectives in the Shadow World shifted.
It felt as though the numbers had gone berserk.
