Annan realized that "Frederick" had just fallen asleep with his head on the desk.
His neck was a bit sore, and his forehead wasn't feeling great. His arms were both sore and numb, and he could feel the heat of his blood just reaching his fingertips.
...But it was also quite nostalgic. This posture.
During Annan's college days, sometimes he would stay up late playing games or working on drafts the night before, and if he happened to pull an all-nighter, he would doze off like this in the classroom for a couple of periods the next day.
But once he started working, he rarely slept at his desk like this—staying late at work until maybe ten or eleven at night, sometimes a bit later if there was a game. After work, the supervisor would often take them out for something tasty to eat.