Twilight and Spike walked through the backstage doors of the Canterlot theatre, walking past a number of stage props and magic trick setups scattered about to the side of the main stage. Trixie stood ahead of them, dressed in her usual showbiz attire, taking notice of them and smiling. She greeted, "Twilight, dragon, you have made it to my stage." Twilight gave her a quick hug in greetings as Spike waved politely. The alicorn backed up and asked, "We got your message, what is it you want us to do?" Trixie walked behind a curtain and down some steps, "Follow me." The couple followed the magician backstage, noticing a selection of tricks strewn messily around. Spike pointed it out, "Hey, Trixie. Do you ever clean up, this place is a mess?" "Yes, but I've had too much rehearsal time to clear up. Besides, I've been trying to perfect this trick I want you two to help me with." She walked to a light switch, flicked it, and in a bright flash revealed her newest trick, a ten foot tall glass tube filled with water, about 15 feet in diameter, a few metal loops embedded in the floor of the tank. A ladder lead up to a platform hanging above the tank. Twilight asked in a monotone voice, "Chinese water trap, really?" "Yes, this trap is designed for my latest trick, and I want you two to test it." Spike smiled, excited about going into the tank, "I'll do it, I enjoy being underwater, so this should be fun. What do you say, Twilight?" She asked, "So you're going to bind us up to weights and you want us to escape, despite having no experience in this sort of thing?" Trixie replied bluntly, "Pretty much, yes." "And what if something goes wrong, what if we can't escape?" "Do not fret, my magic can penetrate this glass, and despite the binds being quite simple to escape from, if something does foul up, I'll release the binds and free you instantly." Twilight stood skeptical about this, asking the young dragon, "Are you sure you want to go through with this, what if we get stuck?" "To tell the truth, I've done this before, Rarity agreed to help me with a few perilous underwater escapes." "How did she agree with you to do it?" "I have some sexual tastes, alright?" Twilight sighed and agreed, "Alright, we'll do it." Trixie clapped once and phased away their clothes, the couple immediately covering their modesty, "Just need to take care of your clothes first, best you do it naked so nothing apprehended your escape." Twilight sighed in annoyance and stood, baring her breasts and labia, "Okay, but where did you put out clothes?" "Relax, they're over there." The unicorn pointed to two chairs behind them, their clothing neatly sorted on them. Trixie pointed at them and ordered, "Stand firm, I shall now bind you in these nylon ropes and attach them to these hooks in the tank when you drop in. I shall also be binding your wrists so your arms will be restricted." Twilight asked again, "And how are we supposed to escape ?" "You worry too much, Twilight. It's all about your centre of gravity and where to shift your legs to free yourself. And remember, you can use your magic to free yourself if you can't escape." Spike reassured her, "C'mon Twi, nothing will go wrong, trust me. If I can escape these sorts of things, then you can too." Twilight looked at him with worry, the dragon lifting his fist, "We'll be fine, alright?" She smiled and returned the fistbump, "Alright." The unicorn then wrapped the rope around their bodies in a specific manner, two diamond shapes revealing the knees and chest, their legs free to move around. Their wrists were tied behind their backs, a long rope trailing behind it, Spike growing somewhat horny to the concept of being bound up, his member starting to twitch. Trixie asked, "Are you ready?" The alicorn sighed and replied, "As ready as I'll ever be." "Okay, deep breaths." Trixie ordered, lifting them up with her magic. The couple took in a few deep breaths, both taking a last, shaky breath simultaneously before being lowered into the water, cold to the touch as Twilight clamped her eyes shut, feeling the water crawl up her chest, eventually submerging her completely as her mane flowed freely. The long rope around their wrists was tied to the hook before the magic around them faded. The couple took their time examining their binds by shifting their weight around a bit. Twilight opened her eyes and watched as Spike shuffled around, finding a spot to loosen the binds. The mare kicked her legs as she did, her breasts bobbing in the cold water, her nipples standing firm. She thought to herself, "Okay, Spike said everything will be fine. Even if I can't free myself, I can use my magic to help if I start drowning. I just hope everything does go alright..." Spike was left alone with his thoughts beside the sounds of bubbles escaping them at random intervals, "Oh man, this is like, my number one fetish. I just hope Twi doesn't notice me getting aroused by this." Trixie watched them intently, checking her watch, "Twenty seconds, they seem to be holding out." Twilight began feeling a tug in her chest as she leant back, the ropes pulling tight at her body, digging between her breasts. She let out a short burst of breath as it bubbled to the surface, "Nnng!" Spike tried to keep a clear head as he attempted to free himself, his boner and lust hindering him, "I really need a release, this is just too much for me to take!" His tail began whipping at the water, the dragon letting out a bubbly moan, "Mmmblblb..." Trixie checked her watch again, "Forty-five seconds, doing good so far." Spike stared at his now grown erection, thinking as he bubbled in surprise, "Oh no, this isn't going to help..." Twilight gently thrashed about in her binds, letting out a bubbly cough to relieve the building pressure in her lungs. She caught Spike out the corner of her eye in some sort of discomfort. She turned her head and blushed profoundly at the sight of his boner, the dragon clamping his eyes shut, thrashing his legs and slightly puffing his cheeks. The alicorn stared at his throbbing member for some time, forgetting she needed to hold her breath, "Oh my god, that thing's huge. Who'd have thought Spike would be turned on by this sort of thing?" As she twitched her leg, a rope dug between her pussy lips, making her gasp, "Gahbl!" Trixie too was mesmerised by the young dragon's erection, but shook herself away from it and focused on the time, "One minute and ten seconds." Twilight hunched over in discomfort, exhaling a small stream of air to relieve her lungs again. She watched as her breasts bobbed in the water, her mane obscuring her vision as she shook it away. "I still haven't figured this out, and I haven't got much air left. I just hope something goes right." She felt a prang in her chest and instinctively attempted to bolt for the surface, her binds pulling her back down, teasing and preventing her from taking a deep breath of sweet air. The sting grew in her chest, the mare puffing her cheeks to prevent her air from escaping. She bucked once in pain, groaning as her cheeks puffed further, "Mmmf!" She bucked twice again, her breasts bouncing with her as the rope dug further into her pussy, sending a wave of pleasure up her body, "MmmMMBL!!" She kept her lips firmly shut, her cheeks swelling like balloons, glowing red in the process. Spike saw his carer struggle under the pressure and doubled his attempt to escape. Suddenly, he felt his right leg loosen from its binds. Twilight watched the dragon start to escape, the dragon beaming as his right leg sprang from the ropes, "Yes, my leg's free! Now the other..." He freed his other leg and attempted to free his arms, to no avail. Then, an idea sprang, "Hang on, what if I lessen my buoyancy?" He blew out a stream of air from his mouth, trying not to swallow the cold water as his feet touched the metal floor. He leant forward, the ropes pulling at him as his body tugged. He focused his strength on his hands, wriggling his wrists in the mess of rope. As if by magic, the ropes around his wrists loosened and he freed his hands, taking off the rest of he binds and darting for he surface, breaking it with a massive gasp of breath. Trixie smiled and called, "One minute and forty two seconds, Spike. Not bad for a child such as yourself." He smiled and climbed out of the tank, Trixie watching Twilight attempt his escape act, "Twilight has picked up on your efforts, she should be free soon." They watched Twilight attempt her escape, sure enough freeing her right leg. She bubbled with excitement as her leg freed, "Okay, then it was the left..." Her left leg loosened as she coughed a cloud of air away, the pressure upon her lungs catching up with her, her breasts swaying side to side. Her loss of air gave her enough lack of buoyancy for her to touch the cold, metal floor with her feet, leaning forward to tug at the ropes. She then wriggled her wrists inside, but instead of loosening, they pulled tighter, the mare starting to worry, "Okay, this is starting to look bad." With more pulls, her wrists didn't budge from the rope, "Come on, I need to breathe." She started frantically pulling as a jolt of pain shot through her lungs, the mare convulsing and gasping a cloud of air as she tried to swim for the surface, her legs flailing, "Gahblbl!" Trixie and Spike panicked, the dragon shaking the magician, "She's drowning, do something!" The unicorn blasted the glass with her magic, but it simply reflected off. She tried again and panicked, "No, no, no! Don't tell me I used the wrong glass!" Twilight struggled to hold her breath, her body tiring from the lack of air and energy, using her magic to try and break the ropes to no avail, "Spike, Trixie, help me!!" Spike pounded on the glass, "Can't you try to free her with your magic?" Trixie nodded as a cyan glow coated the ropes, nothing happening, "Oh no, she must be trying to free herself, my magic's being negated!" The dragon pounded on the glass again, "Twilight!!" Suddenly, a brainwave hit him like a sack of bricks as he quickly climbed up the ladder and vaulted into the water, diving down to the alicorn. Twilight kept struggling as she saw the dragon attempt to untie her. Then, a sudden shock hit her lungs with the force of a train as her cheeks shook and screamed into the water, "HEEELBLBLBP!!" Spike panicked as the ropes remained stuck, now having one other option. Swimming to the metal loop and grabbing the rope, he clamped down on it with his jaw, breaking the nylon as the mare freed herself and scrambled for the surface. She broke it with a loud, shaky gasp before sinking under, the dragon surfacing beside her. To steady herself, she slung an arm around the dragon as they treaded water, Twilight gasping and coughing wildly for air, her hair flopping down her face. Spike watched Twilight gasp for air, tears streaming down his face, "Thank Celestia you're alright. I thought we'd lost you then..." The mare gasped and turned to the dragon, tears running down her face as a large, beaming smile crossed her face as she barrelled into the drake, "Oh Spike, you saved my life, thank you, thank you, thank you!!" They shared a tearful, yet happy hug, Trixie watching with a look of joy and relief as she started crying with them. Twilight and Spike cried into each other's shoulders as the mare stated, "I'm never doing that again, ever!"