"OK! Listen up, everyone! I am going to team you up now, and I want you to stick with your partner."

The diving instructor went ahead an divided the girls on the boat into groups. There was a certain amount of giggling and anticipation in the air. Pia guessed this was about whom would be teamed up with the instructor. He was relatively young, good looking and male, something on that tends to bring one a certain amount of attention on an island populated by 90% females.

Pia was not here for the instructor, although she had to admit he looked decent. She was her to learn diving. She was a good swimmer, had been from childhood, but did not have much experience with diving as such. The chance to explore the waters were part of the reason for her ill-advised decision to study at Shokushu. She had heard about the diving possibilities, about underwater rock formations, even submerged caves. And she figured as long she was part of a group, she ought to be safe. This was one of several lessons, and even if she was an amateur, she was feeling she was getting the grip on things.

"Fitzgerald, you know these waters as well as I do. Hov seems to be ready to see a little more of the sights. You two team up."

Pia did not know Fitzgerald at all, but had noticed her incredible long, purple hair. She was apparently an experienced diver, not a beginner like herself. Pia believed she was a junior, but did not know for sure.

Pia went over to her, and put on her equipment. She wore a yellow and black wetsuit, a legless, long sleeved shortie, kind of like a thick swimsuit with long arms. "Hi.. uhm.. I think I am ready when you are."

Nyelle would have loved nothing more than to whip every girl on this boat into an absolute frenzy, but that would be greedy, and eventually she'd have an opportunity to spend a bit of quality time with each and every one of them anyway. Even though she didn't need the equipment, she went through the motions like every one else because it certainly wouldn't be suspicious to go diving with absolutely no gear. Her head turned and she looked over the other girls as the instructor's voice called out with her name and that of another. Her eyes scanned for a moment before she saw the one called Hov moving looking towards her. Blonde hair, blue eyes, and a wetsuit that displayed every curve, as well as framed her large breasts. This one would be fun.

When Pia reached her, she smiled at the girl while she finished zipping up her wetsuit. It was just like hers, but blue instead of yellow. “Hey hey! Let me do a quick final check of our things and we can hit the water.”

Bold faced lie number one. All that mattered was that the girl was able to breath off her tanks until they reached their destination, then, Nyelle would take over for her. The lie was that Nyelle just wanted to get her hands on the girl, feel her up a bit, an appetizer. “So, where would you like to go?” The girl smiled again as she gave herself the once over first, checking all of her gear so Pia could anticipate her hands when it was her turn. “There's a spectacular canyon near here, a coral reef teeming with fish every color of the rainbow, or if you stay really really close, we can go a little ways into an underwater cavern. I just don't wanna take you too deep for obvious reasons.”

Nyelle took a step forward and reached out to her fellow student with both hands. She started at the girl's waist, checking her weight belt, which allowed her to hold onto Pia's waist for a moment. Her hands drifted south and the back of her right hand brushed against the front of Pia's thigh as she picked up the air gauge and looked at the meter. It was a shame there wasn't any straps that went around her thighs that she could check. Her hands moved back up and ran over Pia's vest, checking the clasps which held it closed. As her fingers rose, they brushed against the sides of her breasts as she checked the fit of the vest, which was nice and snug. The last thing on her list was checked when she laid one hand on Pia's shoulder and leaned around the girl a bit. While her hand fiddled with the calves and connections on the tank, making it look like she was working, her eyes roamed over Pia's ass and down the back of her legs. Nyelle grinned as she pulled back and patted her new friend on each shoulder with her hands. “All set! Which one tickles your fancy?” AKA where will I get to peel that wet suit off of your body?

Pia bought Nyelle's little lie hook, line and sinker. She had no reason to suspect that she was being weighed and measured by a non-human creature. Quite the contrary. If the more experienced girl knew all these places intimately, it probably proved that it was possible to swim there unmolested. Pia knew that several of the monsters were more or less aquatic. That why she never went swimming alone anymore.

"Oh.. wow! That all sounds quite wonderful.. Nyelle.. wasn't it?", Pia began meekly, pronouncing the unfamiliar name with a certain Scandinavian accent. Ny-Elle. She abruptly stopped talking as Nyelle gave her her check up. Being encased in the skin tight outfit had an effect on Pia she had not quite anticipated herself. There was something about being wrapped in the smug material, closely hugging her that was kind of exotic. Pia was excited, all right, but it was not all because of the prospect of seeing the underwater sights.
As Nyelle touched her, let her hands run down her body, that excitement blossomed, and she felt a tingle of arousal. Her nipples poked against the black fabric.
Oh no! I hope she does not notice! She probably thinks I am some sort of pervert!

This did not stop her nipples from stiffening in any way, but made her blush as well.

"Uh.. that sounds wonderful. The fishes I mean!", Pia said, turning her mind to the task at hand. "But..", she continued, a little uncertain. "..if you think I am ready.. What I really would love is the cave."

If Nyelle would have felt those nipples harden as her hands roamed over the girl, or saw them(which for Pia's benefit, they were covered by the straps of her dive vest), they never would reach their destination. Nyelle would have waited for Pia to jump in after her, swim just far enough away to hide the momentary torrent of bubbles as she removed Pia's tank and as the girl probably let out a silent scream. Nyelle would have been just fine with this option, but, sadly, she'd have to wait to see more evidence of the girl's excitement. “Well, like I said, we can go a ways in, but I don't want to take you in too far yet. It can get like a maze and sometimes it's hard to tell up from down, neither of us would benefit from getting lost in there.”

Nyelle gave a shifty glance around before she leaned in close to Pia once more, she hovered by the girl's ear as her eyes darted from side to side again. Good, everyone was busy. “And don't worry, the only thing in that cave is a few blind shrimp and crustaceans, for some reason the other... aquatic... life... steers clear of there... if you know what I mean.”

All except one, all except one. A few seconds slipped by and Nyelle still found herself hovering by Pia's ear, her dive vests pressed together, hands on the girl's shoulders. Nyelle gave a small shake of her head and pulled back, somewhat sheepishly. Her voice was still low after she cleared her throat a bit. “Sorry, I um..” Sorry, I was daydreaming about what I'm going to do to you once we get to the cave “.. let's stop wasting time up here on the surface and get down to that cave! Last one in has to do the other's homework for a week!” Nyelle gave a giggle as she gave Pia a playful slap on her ass and popped the regulator into her mouth. She winked at the girl as she took two steps to the edge of the boat and rolled backwards, disappearing over the side of the boat with a splash.

Pia was confused, bewildered. She did not quite get what the other girl meant. She seemed excited, but yet, her comment about how all the sea life avoided the cave sounded kind of ominous, did it not?

“.. let's stop wasting time up here on the surface and get down to that cave! Last one in has to do the other's homework for a week!”

"Eep!", Pia squealed as Nyelle slapped her ass. The other girl was in the water in seconds flat. Pia followed suit, going in backwards as the instructor had thought her.

Underwater. It was a strange world, a place were light, sound and gravity were slightly different. Diving was a new experience to Pia. The closest she had come before going here was some snorkelling. She was a more than decent swimmer though, and figured she did all right.

Moving slowly, getting her bearings, she looked around her for Nyelle.

Ominous perhaps in the other girl's interpretation, but it was supposed to put her mind at ease a bit. Only small creatures, a side note that they weren't going into the depths to get defiled in some dark under water cave. Well, at least one of them anyway. When Pia got her bearings, Nyelle was a few feet off to her side. Effortlessly she hung there in the water just a bit below the surface. She seemed natural, more comfortable in the water. Her cheeks lifted a bit as she smiled from behind the respirator and gave a thumbs up to her soon to be victim.

Nyelle's hand twisted and her thumb tucked back in as her index finger extended. The water was crystal clear with the bottom clearly visible. Down there was a variety of rock formations, corals, seaweeds, and a plethora of sea life. Nyelle pointed to an outcropping of rocks that looked almost like the hooked bill of a bird of prey. Nyelle slipped to the side a bit and patted the girl's shoulder and gave her a nod. She turned and began to swim down at an angle towards the hooked rock and the nearby cave.

The swim to the cave was about twenty minutes, but nothing but boring. The ocean and it's landscape below and to the sides of them was like an alien world. Kelp like plants seemed to wave to them, fish darted by, corals seemed to reach out towards the two girls. But finally, they reached the mouth of the cave. It's mouth was rather anticlimactic no bells and whistles, no ominous stalagmites or stalagtites to make it look like the gaping maw of some sinister fish. It was just a simple hole in the rock big enough for the girls to enter one by one. Nyelle hovered in the water outside of the mouth of the cave and looked to Pia. It was gonna be a game of charades. She pointed to the mouth, then motioned between the two of them, then brought the palms of hands close together. You need to stay close behind me.

Nyelle waited for a minute for the girl to acknowledge her suggestion before she turned and swam into the mouth of the cave. Almost... just a bit longer and you can spring the trap. A sudden burst of light shot through the water in front of Nyelle as she flicked her flashlight on and illuminated the path in front of her. Nothing was really remarkable so far, it looked like they were simply swimming through a tube. The floor was covered in a fine silt and in stark contrast to the world outside, so far they'd only seen a few blind shrimp. Finally the tunnel opened up a bit and gave way to a large cavern. It looked exactly like a cave on the surface that someone stuck a hose in and filled up. Nyelle turned and pointed the flashlight back towards the tunnel, darkening the cavern as she waited for the girl to slip out. When she did, Nyelle motioned for the girl to swim straight up. There was a small pocket of air she'd hit, measuring the same distance between her waist to her head, before she hit the ceiling of the cave. This time, Nyelle would follow, she turned her flashlight up to light her new friend's way.

Pia nodded to acknowledge the other girl's message. Stay close. Got it!

Pia found that she quite enjoyed being underwater. It was a whole new world, really. Sound was different, light was different. The caves were dark, but Pia did not find them scary. Not with someone to guide her.
She is really good!, Pia thought, quite admiring the ease and elegance of her companion. Nyelle seemed to move like she was born down here, like a dolphin almost. Pia hoped to be like her one day.

WOW! This is amazing!
Pia was marvelling as they entered the larger part of the cave. An underwater grotto. Pia made a few careful circles, taking in the view. She did not dally too long though. Nyelle wanted her to go up, and Pia obeyed. Using the beam to guide her, Pia moved upwards, until her head broke the surface.

Pia let herself float a little, waiting for her guide to appear beside her.

With her 'friend' blindly following her lead and swimming up, It was time to spring the trap. Nyelle lingered at the mouth of the tunnel for a few seconds and kicked her feet. The rush of water off her fins churned up the bottom obscuring the tunnel and the space which Nyelle occupied in front of it. Cut off the one escape, check. The corners of her lips curled up into an eager smile as the body of the student slowly melted away and her true form was revealed. Her eyes locked on the girl's legs as the two jellyfish with covered her breasts swam free, their bells expanding and contracting as they gracefully moved through the water towards her.

Best start moving up, least she get suspicious, Nyelle thought as she began to glide up through the water and left the diving gear behind her, all except for the flashlight. As she swam, she swung several of her stinging tentacles up towards the girl's legs. If she'd only known, she would have probably chosen a full wetsuit for today's dive. The light from her flashlight bobbed through the water as she moved closer and closer to the surface, and her tentacles moved closer to her prey. But right before Nyelle should have broke the surface, Pia would feel something light and almost feathery coil around her legs. It wasn't like the gripping tentacle of say a squid, but more like a light brushing from some under water vegetation swaying in the current.

The very second that her tendrils came in contact with Pia's skin hundreds of microscopic stinging cells fired and delivered their chemical agents into her body. Oh she was sure the student would react someone violently at first, purely out of shock of what just happened, but Nyelle knew that the first hit from her venom would quickly calm the girl and leave her floating on cloud 9 in a state of euphoria. The light from Nyelle's flashlight suddenly began to bob again, but this time it was moving away as it retreated towards the bottom of the grotto. But Nyelle finished her ascent, having no need for the flashlight, and broke the surface. She hovered there in the water, from the middle of her breasts up above the surface and a few feet away from Pia. Her eager smile remained painted on her lips as a few of her non stinging tentacles slowly made their way towards Pia so they'd be ready.

What? Seaweed here? Pia was confused. She was about to reach down when she felt something happening. Hundreds of tiny stingers caressed her skin, and delivered it's gift of potent toxins.

Pia thought at first she had been stung by some sort of jellyfish. She had been stung before many times, mostly as a child playing in the sea. Most of the jellyfishes found along the Norwegian coast were fairly harmless, their touch painful, perhaps, but not deadly. But what about the tropical species? According to official information, no dangerous species dwelled naturally along the Shokushu island. This was a puny comfort, as Pia could feel her nerves reacting. She did not know, obviously, that the toxin was supposed to be euphoric, that in a few moments she would be beyond caring.

The light moved below her. Looking down, she could see Nyelle's flash light tumbling down. Pia forced herself to remain calm. If something had happened to Nyelle, Pia would have to find her and get her out of here, somehow.

"Oh, there you are!", Pia exclaimed as Nyelle broke the surface. Her colour was different. Was it the darkness, with only the faint glow of the flash light bellow. Or was it Pia, the toxin from the jellyfish messing with her senses?
"Are you all right? It looks like you lost your flash light?"

Pia suddenly though Nyelle looked quite pretty. It all looked pretty in the near darkness. Something was moving towards her, but she did not panic. Pia was proud of herself for not panicking. That was not her, though. It was merely the euphoric effect creating an artificial calm.

A laugh would have left her lips if she'd heard the student's thought that it was seaweed that brushed up against her. But this was no time for laughing, it was a time to act. Nyelle's lips turned upwards a bit in a sweet, yet seductive smile as she looked at the lovely young blonde before her in the dim light that her body gave off. She reached out to Pia and laid her nimble fingers on the girl's shoulder.

"I'm fine, just the lanyard on my light broke and I wasn't quick enough to grab it."

She gave the girl a small squeeze on her shoulder which she followed up by a sly wink. As she winked, the non stinging tentacles had moved into position. Just above Pia's knees, they quickly coiled around her thighs, their ends came to a rest dangerously close to where her leg parted from her pelvis. The hand on Pia's shoulder slid around to the back of the student's neck and her fingers rose up onto the back of her head. As Nyelle sprung her trap, she drew closer to Pia and made it a point to press her bare chest against her new friend's. Nyelle leaned in a bit closer to Pia and let her lips come to rest by the girl's ear.

"How are you my sweet?"

While Nyelle whispered to Pia, more of the non stinging tentacles began to close in on the girl, with several of them having wrapped around each other to widen their girth. The wider tentacles hung back for the moment as the others began to tug and pry at the wet suit that concealed wrapped the treat.

"You know nobody's going to come looking for us. You're with an experienced diver, who just happens to be a student. I have you all to myself and down here we won't have any interruptions."

As the tentacles began to peel away shreds of the wetsuit and slowly expose her body beneath it, two broke away from their formerly assigned task and lashed out at Pia's wrists. Just like with her thighs, they coiled their way around her forearms and braced themselves to contain any struggle the student might offer. While her tentacles did their work, Nyelle's other hand drifted down between their bodies and slipped between Pia's thighs. Her slender hand lightly caressed the wet suit material that still concealed her sex.

"And I hate to be interrupted, especially when I found something I want to take my time with. Thankfully I won't have to imagine how good you'll make me feel for much longer."

Normally, Pia would have been rather distressed to hear her partner had lost her light. Yet now she could just giggle. "I-I suppose we should go looking for it..", she began. "But it is right down there.. It is not as if it is difficult to find." Somehow, that seemed all kinds of funny.
Pia grinned, a big smile, her eyes slightly unfocused. She did not know why, but she felt so carefree and happy. They were down in the water, just the two of them, snug inside a cave. It was all so safe, and so exiting..

Then she noticed something. "You are naked!"
Her eyes snapped into focus again, she could not hide, and in her euphoric condition did not even bother to hide, her exited gaze, blue eyes boggling up.She blushed. The other girl was really cute, and she liked having her soft and nude next to her, as she was encased in the thight, thight, wetsuit. The soft light somehow made her partner seem like she had another skin color, almost greenish.
"Be careful.. the jellyfish do sting. Sting. Sting.."
He voice trailed off.. She was drugged and horny.. together with a gorgeous girl, and nothing else seemed to matter.

She did not even mind as her wetsuit was being slid off, at first thinking it was her new friend who was helping her. Yet even in her state, some of her instincts remained, honed by many attacks.
"Nyelle! Watch out!", Pia said. Too late she realized the situation. She tried to struggle, but only succeeded in splashing a little water over them. As she vainly fought to get loose, her newly freed breasts broke the surface, giving Nyelle a good look at her orbs, glistening with salt water, her nipples pink, pointy and hard.