Isekai Royal Royale: 18-nin no Hanayome Kouho

"Royal Royale in Another World: 18 Candidate Brides" is a "harem marriage battle" set in a world populated only by women. Taiga Shishido is summoned to a world populated only by women at the time of his death, and as the king of that world, he is asked to choose his only marriage partner from among 18 bride candidates. In this country where men are not born, the only way to leave descendants is to summon them from the other world by magic. Taiga must choose a queen from among 18 bride candidates of different status, occupation, and race. (Source: Natalie, translated)