As an unexpected descendant of a cursed family of mermaids, Eunwoo's only hope of survival is to never fall in love. For years this was easy enough, until one day he's forced to confront his childhood friend and first kiss, Taeho. But why has he come back, toying with Eunwoo's heart? Can Eunwoo resist Taeho's pull or will he succumb to his hidden feelings, and ultimately, disaster?