The Oyster's pearl(BoyxBoy)

Even if humans claimed they found Atlantis..they were never close to revealing its true wonders, and one of them was the citizens that dwelled who were referred to as bad luck amongst pirates and even modern sailors time to time. Known to lure men with physical beauty and enchanting voices and feast on their flesh to remain young, reverse the clock...are the merfolk.
Meet Aquarius, a young-looking blue haired, sassy, blunt, cocky, (at times) oblivious merman who lives on the Outskirts of Atlantis that lost his parents as a child and lives in a grotto alone with his best friend, Flipper, a protective, loyal bottlenose dolphin as they usually spend their days looking for human things..even if he personally loathes them with a passion, along with the mermaids that tend to flirt with him time to time. Oh the irony, loving what they create and not even liking them. Like the other merfolk, a streak of greed is exposed here and there, but again, even that's not compared to the giant-sized adventure or rather..drama he'll have to endure.
As it turns out, a whole other underwater species called "Soul Sirens" take over the city, the only true way they can be distinguishable is by the white slash marks exposed on their tails, and even then can be hidden amongst the crowd, usually holding a diet of humans, seafood, and..merfolk. As they're aware of this, it seems they mainly spend their hours hiding within their homes out of fear of being consumed.
Meet Noroi, the newly forced king of the Seven Seas all due to...a little help from a Soul Siren follower; holding an equally dark past and taking it out on his subjects..especially a certain bluenette he holds against his own will despite his soft interior and mournful mind. Was it also mentioned that he can change his height, whether six feet or ninty-one meters tall?
Lastly, meet Elvira, a mere servant who attempts to help Aquarius escape...even if it means risking her own life and possibly loosing it later on.