Mesutachi | Koumijima Shuu 7 De Umeru

The main protagonist. He transitions from an ordinary, protective teacher into the essential savior of an entire island's ecosystem.

Within the adult animation industry, Koumi-jima ~Shuu 7 de Umeru Mesu-tachi~ stands out because it leverages a "breeding fantasy" or "population control" trope, which is highly popular in modern adult manga. Koumijima Shuu 7 de Umeru Mesutachi