Recess between classes.
In reality, it's basically equivalent to being after school. Teacher Guo usually only has one class per week, and often there's no schedule at all for an entire month.
Today's class mainly informs how to gain recognition from the Corner and establish an organization.
The action is set for tonight at midnight because the special dungeon only opens precisely at 02:00 AM.
Although class is over, Teacher Guo did not leave, allowing for free questions about the action.
Luo Di had already prepared his questions, "Teacher Guo, can individuals like me and Lebeite who have no contact with manga also participate? Are we any different from you?"
"There might be differences, but the requirements from the Corner don't set any personnel restrictions, so everyone should be able to access the 'affected dungeon'.
Specific questions need specific analysis; when we get to the site, I'll assess and arrange based on the circumstances."