Isekai of the Amazons

A 5-foot-9-inch man is recruited by an ambassador to become a guest worker in a hidden city-state of giant, powerfully built warrior women. Their magic transformed women genetically, leaving the society unable to produce male offspring while increasing fertility pressures, desire, and the risk of dangerous psychosis when some women go too long without sex. The society is nearly egalitarian, bisexual, openly sexual, comfortable with public nudity and some public intimacy, and accepting of common multi-partner unions. Men who join must accept the society’s conditions, including its rejection of domination and submission dynamics, while navigating a culture where women often make the first move.