>>144174I finished reading it 2 months ago and it's not really worth it.
The pacing goes staright to shit once all the teachers are dead and the ending is just unsatisfying.
Thr concept is great but not used very well.
the mangaka also tries to shoehorn a last effort environmentalist message and it's really poorly done to the point of making me angryI'd rec Death Star Remina instead for good apocalypse manga.