The premise of the anime is interesting, the animation work is competent, but it fails upon delivering a substancial experience that will make this show stand out from the crowd.
The whole high schooler having to deal as a teacher thing can lead to so many possibilities of story telling in a romantic comedy. The anime "The quintessential quintuplets" proves that you can make a harem anime that treat its characters with respect and make wholesome and funny moments that will drive the story forward. Which is not the case with "We never learn".
I was having some fun with the anime and the tipical absurd romantic comedy cenarios until I realised that the show had no intention of developing ANY of the characters relations. The results are the same will-they/won't-they cliche jokes over and over again leaving us with only a few and far between touching moments.
You can enjoy the simplicity of the story but if you're looking for anything more than a simple story with the same pattern repeating over and over again, you better look for something else.