My Three Mermaid Wives

Synopsis of My Three Mermaid Wives: At a black-market auction in a post-apocalyptic world, three dying mermaids—Princess Elena, singer Ruby, and the aloof Astrid—are about to be abused by gangsters. Ethan, who has unexpectedly unlocked the “Heart of the Ocean” system, saves them by bidding an astronomical amount of precious purified water. The three become his wives.