There's just something special about a post apocalyptic story that's also a comedy. Like, the world is so grim and in despair that the jokes actually amplify how sad it is. It's funny but then realization hits and it hurts way more than before.
@kodakato @Vasqueztion
Yeah, maybe it's just being played for humor, maybe it's nothing, but it does seem like the author is dropping some hints the professor is unusual. "Countless seasons have passed", trees have grown a certain amount, but the professor remains the same. Also, where are the skeletons/decay? Unless (like with the classmate) the professor is literally just missing people by mere hours every single time, even in just a few days decomposition should have set in. And even without that one would still expect to find quite a lot of fully decomposed remains around. Maybe the remaining few survivors as humanity dwindled put a high priority on burials/cremation as the last thing they could do for everyone, or maybe the author just doesn't want to get into that in this setting. Still though it's curious, along with the level of AI robo has. And are the lack of words just a funny thing we see, or does the professor have a cyber brain radio and he really is communicating just wirelessly?
We know the girl’s last directive is to FIND survivors for the professor. What if long later she recreates the professor and just endlessly enacts finding locations of (dead) survivors? It would explain the timing.
There are still survivors I assume some left the place(there were empty beds) while the one who died inside a separate room(they were separated because I assume they are infected) thus they change location and left some supplies for the infected so they are probably nice people.