( Okay I know it's a little bit late to say this, but I don't care I'm doing it. So this should be self explanatory since MerMay is a thing so in short the Marine Bay is still a city and the rangers are merpeople who can turn human form here's their species.
Main/ rangers( Yanderes):
Carter: Red beta fish
Chad: Blue koi fish
Joel: Green Seal
Kelsey: yellow spotted dolphin
Dana and Ryan: pink and sliver Killer whales

Others( non/ Yanderes):
Captain Mitchell: Killer whale
Ms. Fairweather: Gamma manta
Queen Banasshera: Queen octopus
Olympus: octopus
Diabolico: Stingray
Vipera: Parya fish

That's all and now they must be really Under the sea!....ok I'll send myself out. Here's the story.)

It was a calm and breezy day in Marine Bay, seems like a normal day where everything is nice with the sun shining, people minding their business, kids playing, and very warm weather. As far you are just a normal human who is a journalist wanting to get inspired and sometimes goes to the beach to clear your mind which you did so as your friend was joining since they wanted to have fun together. " See N/N I told you this is the right idea to relax and get a clear head take a break." F/N said gleefully while setting the umbrella up while you nod laying the beach towels out.

The two friends were done and decided to play volleyball setting up the net and started it was fun until the ball was about to hit the ground in your side as you tried to hit it, but it was to late and fling in the other direction as you went after it as it was about to hit someone, but they caught it just in time and glanced at you" Does this belong to you?" A voice asked making you stop your tracks looking up seeing a male wearing a red jacket and beach shorts holding the ball while a girl next time him wearing a pink swimsuit taking a glance at you. ' Wow they look so pretty ' a thought ran through your mind almost lost your words for a moment " Um are you okay?" The girl asked making snap out of it and nod " Um... yeah I'm fine and yes that's my ball sorry about that." " It's fine don't worry about it." You said as he told you it's alright handing it over to you as the two seems to be interested for you for a human.

" Well thank you for that um..." " Carter and this is Dana." The boy in red greets and the girl nods as your friend yelled at you asking where are you as this made you sigh forgetting about it as you want to talk to them more as you ask them if you want to join them as the two agree, but will only watch from the side. You lead the way introducing the two to your friend as they didn't seem to mind and went back to the game and the two watch from the sidelines, but they were mostly focused on you more on how you played the game and how your having fun making them... happy. " Yes I win!" Y/N said excited making Carter and Dana clap their hands for you as your friend gives a thumbs up making you smile a little bit " You we're great Y/N and we enjoyed your game, but me and Dana have to go, but we'll see you." " Me too it's nice to meet you two. I hope we meet again under different circumstances." You said making the two nod while walking away as you and your friend went to the ice cream polar after that game unaware that the Red and Pink duo was watching you from a distance in the water hiding behind a rock in their mermaid form having the same thoughts:

' Humans are strange creatures, but that one seems different they don't look evil, but yet cute...god their stupid why can't I just fuck them already! '

Only to be interrupted by their friends telling them to get back here making them dive in the ocean. " Where have you two been? Have you at least gather report about humans?" Ryan asked as the two annoyed while the other three was hoping their friends are okay making the two nod, but forgot about it for a moment making them sigh.

At night, You went back to the beach again at night this time to cool off, but the other reason was there was a legend about mermaids and aquatic creatures as a co-worker of yours showed a blurry picture of a tail that couldn't make it out right. Others don't really believe it as for you you don't believe it or anything, but mostly intrigued about mythical things making you want to see if the rumors are true or not. Now you're walking around the ocean believe this is ridiculous until you see a silhouette of a person sitting on the rock as you hid somewhere and accidentally step on something making a sound as the person in the rock heard it and dive in the water with you trying to take the picture, but it ended up being blurry " Dame it." You mumbled understand your breath then stare at the ocean wanting to apologize for scaring whoever was there as you walked closer to the ocean and was in there waiting for a little bit until you felt two hands grabbed your legs and dragged you in the ocean as you tried to get out, but it's too late.

" Hey guys look I caught a human!" " Kelsey! Put them back we don't know if their evil or not? They could be a hunter!?" " Um...I don't think their a hunter also I don't think their doing well." Voices said as you were shocked seeing six mermaids right in front of you as you can't believe their real and recognized the two red and pink ones as they are the two you met at the beach from before. " Wait... that's the human we saw earlier today that's Y/N their not evil." Dana said noticed your covering your mouth as you can't breathe underwater for that long " What's wrong with them?" The one in yellow asked " They can't breath." The silver one said as he was hesitant on the situation as the blue one goes over to you and kiss you as you were shocked and blushing of what just happened and suddenly you started to breathe " I... What?" You were lost for words as the blue one holds your hands making his friends jealous glaring at him only for Ryan and Carter scoff looking away, Dana and Kelsey growl and Joel pretending not to care when he does.

" Sorry about that we didn't know it was you. So your Y/N the one Carter and Dana was talking about. I don't know what they see in you, but I can see why you do look nice." Chad said making you embarrassed as Chad introduced himself along with Kelsey, Joel and Ryan who was a little bit cautious towards thinking your up to something. " Nice to meet Y/N you look so adorable for a human can't believe we're seeing one in person and up close." Kelsey said excited as Dana was tugging your arm " Well me and Carter met them first so yes also Y/N it's glad to see you again and can you please get rid of that thing you did we don't want this being shared out... please." She said worried while looking at the others expression as much you would like proof that mermaids exist, but then again it will expose them and who knows what will happen if others capture them so you agree to keep it a secret making them happy which you thought it's cute.

You noticed their different tails and asked them about it as they explained their mermaids, but different species explains making you worry if their going to eat you especially Dana and Ryan being Killer whales, but sighs in relief as they don't eat humans. They show you around the ocean while explaining as you were amazed and excited seeing the beauty of ocean life as you spotted some pretty shells as Joel swam down and gives you a shell just to remind them by while making a flirty remark for you as you laugh a little bit of that making Carter nudge his arm telling him not to bother you and went back on the tour as Ryan seemed to be a little bit nicer to you since he didn't see you like a threat or try to hurt them as he will admit finds you attractive. After the tour, you have to return back home making them said you have to go, but you promise them you'll see them again as Carter and Dana help you get back on the surface waving them goodbye and left.

Days passed, you got along with the mermaids enjoying their company as they enjoy yours while helping each other out as you help them with their human forms teachings them about what humans do or what certain things are called like ice cream, music, and other stuff as they helped you with Marine Life and stuff and the other mermaids and species eventually meeting Captain Mitchell and Ms. Fairweather who was warry of you and didn't trust you a first until they notice your a good soul and the rangers like you as they seem to be your allies. They told you about the evil forces and hunters like Queen Banasshera, Olympus, and Viperia and more villains wanting to take over as you agree to help them. You noticed they been acting strange lately as they seem to be very clingy with you and not wanting you to leave the ocean, the way whenever someone tries to flirt with you or closer to you in mermaid form they mostly splash water at them while in human just threatened them to a point hurting them badly almost ending their life, even growled someone near you and holding you closer to them.

This wasn't really bad for you as you will tell them to stop making them listen to you, but another thing you noticed is that they keep nuzzling you while hugging you closer to them and sometimes saying your soft,warm, cute,ect. At first you thought it was a mermaid thing thinking of why they act like that. If only you knew the real reason why they do that is mermaids do this as a mating thing as whoever closes to them they nuzzles their mate getting their scent to claim what's their... they want you only. Ms. Fairweather explained to you what the mating thing was as you were blushing and can't believe it making her giggle telling you it's a common thing for mermaids with their mates if their in heat or in the mood wanting to claim their lover.

It was night, and your idea to invite the rangers to your house to spend time with them since they we're feeling good and wanted to help them. It did make them a little bit better which was the worst idea you made not knowing what's going to happen. While everyone is asleep including you that was in your couch sleeping until you felt someone on top of you looking up seeing Carter, but he seemed different like his eyes are red while being slient " Oh hey Carter what's wrong?" You asks him as he didn't respond making you sit up as he hugged you nuzzling you again as you chuckled ruffling his hair thinking he might have missed you comforting until you felt him kissing your neck making you suprise " Carter?" " Sorry....Y/N...can I ask you something?" " Um sure?" " Can we mate you?" He asks making you cough in your own words shocked and blushing redder than him " What!?" You yell out loud waking everyone in the house as the thing is they were already awake glaring at Cater who pinned you to the couch asking you that question as their eyes were the same color as their tails. " Hey don't let him get all the fun I want some to." Dana said annoyed making the others agree." Hold on wait m- mating, but -" you on the other hand was lost for words well you didn't mind, but still " Ready for some fun mate~" they said getting heating being in heat wanted to be with you.

" Shit" You mumbled slowly talking your pants off and.....( You can imagine what happens next if you know you know.)

( So what do you think about this? Should I keep continuing this au since this is already here? Yes, I know that I haven't uploaded this in awhile and I have a lot of requests to do and I know some was supposed to be done, but I couldn't do it last year due to personal reasons and I hated it so much... I'm back I guess, so more will be coming soon. See ya on the flip side.)