s01e12 — One More Time, Teacher

Surprisingly good anime. No, seriously, at first I was sure that there would be another harem etty, but fortunately this is not the case.
I was pleased with the drawing, everything is really very well done, although without frills. The music is also good (one background track is a bit like the song "Yukinohara" from Clannad, and anyway there is a very atmospheric soundtrack).
The plot is a bit lame in some places (and not a bit in some places), but overall it turned out to be interesting. By the way, without the "alien" theme, this anime would have turned out to be an outstanding example of the "everyday life" genre.
In short, it's not bad, it's worth a look.

Oh, and don't forget to watch the extra episode - its finale is important for the plot as a whole, "draws the line". I would even say that this is almost a full-fledged thirteenth episode.