There is a pen on the table. Who could have left this pen ? When touching the pen, it felt a bit cold, but the sun is really hitting today, that must mean it was close to a cold area. It was left on a table close to the door that leads to the kitchen area. My guess is, the lunch lady kept the pen in the fridge and put it back on this table to play a joke or something. I am around 23.61% sure of that theory.
This is more or less this show in a nutshell.
The MC is that dumb, overrated, arrogant student who thinks he's great because he can make useless and stupid deductions like that. So, as he is such a great and genius pained soul, all he wants is to become "ordinary". So in this show, we follow the evolution of this overly inflated guy in his quest to humbleness and modesty, because he is so much greater than everybody around.
As you understood, the MC is really hateable, as is the FMC who is constantly comforting the MC's position as she's spitting the same stupid things like she wants to become ordinary too because she's so much greater than everybody else as well. So as a viewer, you need to follow both their point of views, which is really painful and unrelatable.
To add on to the pain that it is to follow those characters, the anime is just a constant chain of useless deduction to know where a wallet is lost or how do you make good coffee. You would find more interesting stuff randomly searching on Youtube. The animation is good though. I find it really interesting how Japanese studios find the worst places to invest budget in.
Animation : 7
Music : 5 (why the mushoku tensei soundtrack on this snoozefest ?)
Character : 1
Story : 1 (what story ?)
Overall : 3
Watch this anime if you want to watch 2 smug kids feeling so much above the rest of humanity because they guessed the preparation of a cocoa drink