Isekai Royal Royale: 18-nin no Hanayome Kouho
異世界ロイヤルロワイアル ～１８人の花嫁候補～
A man named Taiga Shishido is summoned to a world composed entirely of women at the moment of his death. As the designated king, he is tasked with selecting a single spouse from 18 bride candidates who vary in status, profession, and race. In this society, where no men are born, the only means of producing offspring is through a magical summoning that brings individuals from another world. Taiga must choose one queen from the 18 candidates.