At that moment, the Demon Lord's Royal Theater, enveloped in a demonic eerie sound, concluded its first course. The stage lights gradually dimmed, leaving only trembling tunes of dark hell, shrouding the entire auditorium in thick darkness.
In the hallway outside the theater.
The long, deep tolls of the ancient bell piercing through the darkness of the corridor announced the advent of rest time.
This sound seemed to possess a mystic power that could ignore the hard stone walls, glide down the pitch-dark corridors, brush past the doors and windows of each classroom, eventually reverberating within this seemingly infinitely vast building.
Next up, all the demon students of the school will be given their first 30-minute break.
This time could be used to find a more desirable classroom.
Or during this half-hour when the corridor of the classroom is open to the utility area, one can go to the utility area to spend the extra credit coin and skip the next two-hour course.