瑠璃の檻 ルリ・ノ・イエ －DOMINATION GAME－

Events take place on an island that mirrors Innsmouth in the mythos. It is ruled by the Mashuu Family, and the hero ends up marrying the last daughter of that family, Mizuki. He also gets stuck with an immense power and the role of giving women over to the islanders as breeders.