Description

At the age of eight, Aragaki Kuya was involved in a shipwreck and was transported to another world. The other world seemed tranquil at first glance, but it was a world where the countdown to its destruction had begun. It was a world where men suddenly turned into monsters called Remmas! Kuya was at a loss when his master, who had guided and raised him as a child, also became a Remma. Then, a ship carrying a girl from the neighboring continent washed ashore in front of him――!? The only man left in the world can change the world on the brink of destruction!

Maybe coming in

Otoko Ga Horonda Sekai ― Eiyuu Senshi No Harem World ― Chapter 2

Otoko Ga Horonda Sekai ― Eiyuu Senshi No Harem World ― Chapter 3