Note 20 read: [The Teaching Building has a Building D. Building D seems to be outside this space.
The Teaching Building has a Basement, but the conditions under which the Stairwell leading to the Basement appears are still unknown.]
He crossed out "seems to be," then continued revising:
"The Teaching Building has a Basement. (The rest crossed out.) People who lose their Student IDs will see the Stairwell leading to the Basement after being contaminated (or experiencing a layer drop, or something else?)."
There had been twenty notes in all. After revising them, Lin Yi read through them from beginning to end. Once he confirmed there were no problems, he briefly sorted through the day's events, then began adding new notes:
"23. The Convenience Store is located in a spot in the First-Floor Cafeteria that receives no artificial light but can receive sunlight. This location may be related to certain characteristics of the layer it occupies."
"The Convenience Store may occupy more than one layer?"
"24. The green fog emitted by Contamination Persons also attracts the attention of strange entities such as night-walking species."
"25. The mechanics of nonhuman entities' void targeting are not yet fully understood."
"26. Contamination Persons can be attacked preemptively when necessary, but it is easy to get tomato sauce on yourself, and whether this causes adverse consequences is unknown."
"27. The Teaching Building is a nest for night-walking species."
"28. ..."
He paused, changed the period in the previous sentence to a comma, and added, "...one of them. The life-form of night-walking species is not yet understood, but sunlight can be used to kill them."
"28. The Blue Apron Chef of 'As If Present'..."
At this point, he suddenly found himself unable to continue. He twirled the pen around in his hand, but in the