A young black woman of English descent is near the shoreline in a orange two piece bikini,She had sparkling blue eyes and long dark blue hair that reached down past her back to her hips. She wore a pair of round earrings dangling from her ears and had a blue necklace on. this young lady is none other than nessa,the water type gym leader of galar.

Nessa: ahhh~the sea is calm and beautiful as always~

Nessa continued to walk on on the shore of the beach, feeling the breeze of the wind blowing through her hair which she brought her hand up through enjoying it. Nessa continued onward as it was just her that was there as there was no one else on it. The Beach was her favorite place to go to, there was no place else she liked to go to other than here, where she didn't have to worry about anything. Nothing here but the spray of the waves, the breeze of the wind and the feel of the sand beneath her feet. In her eyes, this was Paradise.this is why she loves the sea so much.

Nessa: ok,time for a swim.

as nessa walked towards the water,something caught her eye,an mysterious blue stone in the water,filled with curiosity,nessa bended down and grabbed the shiny stone,she held the stone in her hand and started examining it.

Nessa:this stone looks just like the sea,so beautiful…

as nessa is amazed by the beauty of the stone,the stone it self started glowing brightly.

Nessa:what the?! the stone! it's glowing! gahhh!

nessa closed her eyes as an blue light engulfed her,but when the glowing faded,nessa remained the same,but the stone disappeared.when nessa opened her eyes again, she was shocked.

Nessa: wait,where did the stone go-wuh? why I'm feeling dizzy?

Nessa then fell down to the water,then she blacked out,her body remained unconscious for 3 hours straight,but after 3 hours ,she woke up,still confused what just happened to her.

Nessa:ugh…many weird things happened to me today…

Nessa looked around,it was already night,she quickly dried herself up and grabbed back her bag while checking her phone,it was already 11:30 pm.

Nessa:oh shoot! I didn't realize how long I passed out! I better get back home,I need train other people at the gym tomorrow!

Nessa quickly ran back home,but she didn't know that a strange marking appeared on Nessa's left ass cheek,the marking resembles a mermaid.Nessa quickly returned home and went to sleep.

(The next day)

Nessa was training other water type pokemon trainers at her gym,after 6 hours of teaching,nessa went to the changing rooms and took a shower,when she was drying herself up,one of the gym trainers lynn,noticed the marking on Nessa's ass,and she asked nessa about the marking.

lynn: hey Nessa? I want to ask you about something.

Nessa:ok,go ahead.

lynn:why is there a marking or something of a mermaid on your left ass cheek?

Nessa blushed and looked at her lower body,and she looked at her left ass cheek,lynn was right,there is a marking of a mermaid on her ass.

Nessa:well…uh…that…was…a tattoo I got recently! hehe…

lynn:nice,suits you.

lynn winked at Nessa as she complimented on Nessa's new 'tattoo'

Nessa:why thank you…

Nessa replied as she covered her ass up with her towel while blushing.after nessa left the gym,nessa immediately rushed back to her home and took off her clothes,she looked into a mirror while showing her ass to herself.

Nessa:when did this got on my ass?! I swear it wasn't here yesterday!

Nessa originally thought that was just a drawing,so she used some tissue and water to rub it off,but it didn't work,the marking didn't go away,as nessa was panicking,her phone rang,nessa immediately grabbed her phone and answered it.

Nessa:h-hello? who's this?

Bea: nessa? it's me bea! I just wanted to ask you that do you want to go to that new Cafe opened at Ballonlea?

Nessa:oh! about that! I'm kind of busy this evening,maybe next time…ok bye!

nessa immediately cut bea off,leaving bea confused.

Bea:ok then…well looks like I'm going to that Cafe myself!

Back in nessa's home,nessa is still panicking about how the marking appeared on her buttocks.

Nessa:ok! ok! maybe a nice warm shower can calm me down first! then I figure this out later.

Nessa went into her bathroom and started filling her bathtub with water,she dipped her

body in the water,and she started to feel relaxed.

Nessa: ahhhhh~this feels much better!

but then the marking on Nessa's ass started glowing blue,which caused the water to glow blue,which made nessa panic again.

Nessa: what's happening to the water?!

Nessa then heard a voice,a voice calling for her.

???: Nessa…Nessa…

Nessa: did someone just called my name?

Nessa looked around,there is nobody in her house but her.

Nessa:No no no, I must be Hallucinating! there isn't a voice here-

???:come back nessa…come back to the sea…

Nessa:t-the sea?

the voice then faded away,leaving nessa more confused then before.also the water stopped glowing along with her mermaid marking.

Nessa:come back to the sea? what does it mean?

Nessa then left the bathtub and went to sleep directly,still thinking about the words the mysterious voice said to her.

(sometime later…)

Nessa is currently having a dream,she is swimming freely in the ocean without any worry.

Nessa: the sea…its so beautiful…

but then her body started feeling numb,she couldn't control her body.

Nessa:wha?! m-my body?!

without any warning,her body started glowing blue,and Nessa yelled in pain.

Nessa:ahhhhhhhh! what's going on?! ahhhhhhhhh!

?: riiiiiiiing!

Nessa:hah!

Nessa then woke up,her alarm saved her from her nightmare.

Nessa:oh…just a dream…better start my day…

Nessa then left her bedroom,after she changed into her gym outfit,she went to her gym to continue her work,Nessa liked her position as a gym leader,but all of this constant training is starting to feel dull for her,after a Another day of training,nessa went to changing rooms,when she took off her shoes,she realized something,her toes had turned blue,at first Nessa thought this was a prank,so she asked the other gym trainers.

Nessa:ok,who put blue paint in my gym shoes?

lynn: it wasn't me Nessa, I swear!

the other gym trainers nodded in unison.

Nessa:right…I will find the culprit! after I wash my feet of course!

nessa stepped into the shower,and started scrubbing her feet,but her toes are still blue.

no Matter how hard nessa scrubbed.

Nessa:that's strange…maybe this isn't blue paint…

After nessa left the gym,she walked along the shoreline,when she suddenly heard the voice again.

???: Nessa…

Nessa:it's the voice again!

???: The transformation is starting…Nessa…

Nessa:transformation? what is he talking about?!

Nessa slowly walked back home and sat on the sofa,she is tired not physically,but mentally as well.

Nessa:god…am I going insane? there is a marking of a mermaid on my ass,my toes had turned blue,and now I'm Hallucinating!

I need some rest…

As Nessa walked towards her bedroom,she suddenly tripped and fell over.

Nessa:owww!

but then something strange happened,Nessa's body started to clothes is immediately destroyed,leaving nessa naked.

Nessa:huh?! what's going on!?

Nessa's boobs starting growing,from B cup breasts to C cup breasts,her ass starting swelling up,now Nessa's ass is rounder and more plump than before,nessa turned her head,the marking is glowing blue again.

Nessa:ahhhhhhh! the mermaid marking is causing my body to change?! huh?

Nessa gasped as she felt something was wrong with feet,she flipped her body lying on her back and raised her upper half to see what's going on,the sight made nessa cover her mouth in shock,not only her toes are blue,now, her feet is entirely blue,but that's not all,her feet is now webbed.

Nessa:ok things couldn't get any worse-ahhhhhhhhh!

Nessa's legs started turning blue as well,now small blue scales started growing on Nessa's legs.

Nessa:wha-what's happening to me?!

???:The transformation is continuing…Nessa …

Nessa heard the voice again,this time,she asked the voice what is going on with her.

Nessa: w-what…am I turning into?!

???: A mermaid…Nessa…

Nessa gasped in shock as she heard the voice.

???:you are turning…into a mermaid…Nessa…

Nessa:No…no no no!

???: you are destined… to be a mermaid… Nessa…your love for the sea…is shining upon you…you don't belong… in the land…Nessa…you belong…in the sea…

Nessa:i…belong in the sea?

???: yes…and the transformation will be complete by tomorrow…and Tomorrow night …you will return to the sea…

Nessa:no! wait! I want to ask-

the voice faded away,Nessa sat on the floor,looking at her blue and webbed feet and blue legs,she is going to be a mermaid by tomorrow.

Nessa:i'm…destined to be…a mermaid?

Nessa then closed her eyes and went to sleep on the floor as her legs kept spreading blue scales,she can't escape her fate,she is destined to be a mermaid.

(The next morning…)

Nessa woke up on the floor,she looked at her legs,now 80% of her legs is covered by blue scales, except her waist and ass,nessa stood up and walked to her bedroom.Nessa was not ready for this,she is going to be a mermaid in less than 8 hours,she sighed as she called bea. after a while,bea answered the call.

Bea:hello?

Nessa:hey bea…it's me Nessa…you want to go to a Cafe today?

bea:sure! I'm on break today,meet you at the Cafe at motostoke 2pm sharp!

Nessa:ok,see you there!

Nessa then ended the call,the last thing she wanted as a human,is to chill out with her best friend,nessa put on a blue and orange T shirt and a black jacket,and some dark blue long pants to cover her legs,then she headed out to motostoke to join up with two went inside the Cafe and sat down,and the two started to talk.

bea: wow! nessa! your body is way bigger when we last met!

Nessa:i worked out a lot often…kinda explains why.

bea:yeah! that's what I thought!

Nessa:bea…

bea:what nessa?

Nessa:what will you do if your best friend is a mermaid?

bea: huh? why would you ask that?

Nessa:just a question…

bea:well,no matter if my best friend is a human or a mermaid,she will still be my best friend!

Nessa:i see…

The two kept chatting at the Cafe,nessa then returned home and sunset,she pulled down her pants and looked into a mirror,she watched her ass turning blue and scales started growing on her ass,and then… Nessa watched the sunset as she bids her human life goodbye…

Nessa: Goodbye bea…

Then nessa felt something tingling on her neck,she touched it,it was gills,and suddenly she started breathing heavily.

Nessa:i…can't…breathe! i…need…water!

Nessa rushed outside,and ran towards the beach,as she was running on the sandy ground,her legs started fusing together into a fish tail,and she fell to the ground as she can hardly breathe.

Nessa:ahhhhh! must…reach…to…the…sea!

Nessa then crawled her way to the ocean,her vagina vanished and her ass crack is sealed,her feet flattened into a fish fin,When nessa finally reached to the water,she immediately dived down to the ocean,then she can now breathe normally again.

Nessa:hah…i'm…a mermaid now…

Nessa's transformation is complete,she is now a mermaid with a beautiful blue mermaid tail,Nessa waved her new tail happily as she smiled.

Nessa:maybe being a mermaid is way better than a gym leader.

???: Nessa…

Nessa:the voice!

???: you have finally returned to the sea…Nessa the mermaid…

Nessa took off her blue and orange T shirt and black jacket,and the clothes floated up,leaving nessa half naked.

Nessa: i am nessa, i am one with the sea,and now…i will live as a mermaid forever…

Nessa dived down deeper into the ocean,she smiled as she is Enjoying her new life in the ocean,Nessa the human is no more,now…only nessa the mermaid remains.

End of part 1