[COMPLETED] pirate captain kim hongjoong needs neptune's trident to control the seas. he steals the song of the unpredictable siren park seonghwa, forcing an uneasy alliance. as secrets about the trident unfold, their quest could cost them what they treasure most, potentially tearing them apart forever. - ateez!pirateau - main pairing: seongjoong side pairings are main ships (yungi, jongsang, woosan) multiple povs