AS

In a world where humans, mermaids, and mermen coexist, Y/N is forced into an arranged marriage with Ace, a merman who loves her unconditionally. But Y/N’s heart belongs to someone else. She treats Ace cruelly, betrays him, and repeatedly chooses her childhood best friend over the husband who would sacrifice anything for her. Yet no matter how badly she treats him, Ace continues to protect her whenever she is in danger. Until one tragic day, Y/N’s life comes to an end—and Ace gives up his own life trying to save hers. But death isn’t the end. Y/N wakes up and realizes she has been given a second chance, reborn at the very beginning of the life she once destroyed. She remembers everything. Ace remembers nothing. Now Y/N has to live alongside the man she once hated—the man who died for her—while he has no idea that they have already lived and lost everything once before. This time, will Y/N change their fate… or will history repeat itself?