1000 nin no Homunkurusu no Shoujo-tachi ni Kakomarete Isekai Kenkoku
Dragged by the ritual for the revival of the evil god of a different world, an ordinary senior high school student Furutera Isshi meets 1000 Homunculus girls that were created for the sake of sacrifice. Hearing about the horrible treatment of them being just tools for the humans, he decided to found a nation for Homonculi, where he promised to give them a peaceful life.
Summoned with gifts and the inherent magical ability bestowed upon him by the girls, half-united with the Evil God due to the botched ritual, Isshi stops being a human. While flirting, the story of the strongest nation founder in the different world will begin here!
Source: Novel Updates