Blowing the Ballasts

You finally reach the wall of the swimming pool, surfacing and gasping as you lean against it.

"Alright! Nice job! You're improving," says Lee Jiwoo, your swimming coach. She whoops and claps for you, which resonates in the indoor pool. Even more so since you've been practicing quite long on this late afternoon session so the pool is devoid of everyone else.

"Yeah! I didn't...I didn't feel like I was gonna sink like a stone there," you exclaim breathlessly, hitting a high-five that she offers. You look around the empty pool, chuckling to yourself. "Damn, but I really took a while though, didn't I?" you ask, embarrassed.

"It's okay! People learn at different paces. This is your pace," Jiwoo assures, tapping your shoulder. "Although, maybe there were some things getting in your way? Some kinda...distraction?" she asks somewhat playfully.

"Uh...distractions?" 

"Mhm."

You swallow. It's right in front of me, you want to say, but that wouldn't be appropriate, would it?

"Is it...right in front of you, maybe?" she asks, eyeing you up. Your face stretches. Damn, this girl can not only teach swimming, but read minds as well?

"That's—er..." You silently stutter for a less frontal alternative, but none comes to fruition.

"I take it that's a yes," she chuckles in a low voice, biting her lip and tilting her head. You close your mouth and look down in shame, your skin feeling colder than the pool water.  "H–How did you know?" you mumble. Jiwoo chuckles again, absolutely not helping your situation. 

"How wouldn't I? I could see you were hard before we even started." Jiwoo takes a step closer to you. 

"I'm...sorry, noona." You look up at her face again, your cheeks burning and your cock straining against your swim trunks. "Tsk tsk. You little pervy boy. Does my outfit make you horny?" she asks, voice still playful but a tad lower.

Your lips tremble and your arms shiver, it feels like you're shrinking under her gaze. Well, all except for one part of you downstairs.

"Come on, tell me honestly. Does my outfit make you think dirty things?" Jiwoo's voice is low enough that it can only reach you now. And it oh, so turns you on like a stiff light switch.

"Y–Yes...noona. It—" Your eyes glance to her thighs underwater, sending a jolt through your chest. "It really does." How could it not? You're an early 20s, porn-addicted adolescent who's never had any meaningful interaction with women around your age.

When you stepped out of the locker room and saw Jiwoo in her swimming outfit, your mind went into the gutter faster than you could sink into the deep end of the pool.

The full black bodysuit hugged her slim figure beautifully. The cutouts on the sides teased her smooth waist and the V-shape they created directed your focus down to her forbidden triangle.

Speaking of that, the swimming skirt did not help very much. Its length—or lack thereof—showed off so much of her luscious thighs. The integrated safety shorts almost worsened the problem, molding to her pussy lips like a glove.

"I see. So you were distracted during this session, correct?" Jiwoo's back to her professional tone, but her demeanor otherwise didn't change. You nod slowly in response, your skin feels like it's on fire and freezing cold at the same time.

"Hmm. Well, you still did pretty good despite the fact, so that's that. But..." She hovers over to be right in front of you. You're suddenly aware of how the water makes the outfit cling to Jiwoo like a second skin, leaving nothing to the imagination. "We'll need to include some...focusing exercises in our next sessions."

Your voice catches in your throat. A hint of Jiwoo's body essence is evident even over all the chlorine, so close is she standing. "Focusing...exercises? Like what?"

Jiwoo tilts her head and smirks, then you feel her hand on your bulge. You gasp and buck, whimpering when she fully gropes you underwater and curls her fingers around your covered erection. Jiwoo grins and scoffs at your reaction, shifting her body closer still. Her shapely boobs are just short of pressing against your pecks, her warm breaths tickling your cheek.

"Since this little guy down here's hogging your attention..." Jiwoo snakes her hand underneath your trunks, touching you directly. "We'll get him all drained before we start, deal?"

You should stop her, turn her away, report her or at least cancel all future lessons and change coaches. Instead, you’re shivering and turning to mush, your hips chasing her touch.

"Hey, rookie. You heard what I said?" Jiwoo snaps her fingers. "Y–Yeah! I did," you huff, biting your lip. Jiwoo chuckles, shifting her groping hand slightly. "So, deal?" You clench your jaws and groan, then nod fervently. "Deal! Whatever you say, noona!"

She hums and slips her other hand under your trunks, gripping the waistband. "Good boy." She pulls your trunks down to your thighs, baring your dick under the water.

Now your cock is fully out, Jiwoo gets a good purchase with her hand and begins stroking you, twisting every so often. A pathetic groan escapes your mouth before she cups her other hand around it. 

"Hey, hey. Your voice echoes like crazy here. You wanna get caught by the lifeguard?" Jiwoo whispers. You shake your head and squeak. "No..."

Jiwoo releases her hand from your mouth, using it to stroke you now. "Then stay quiet for me, will ya?" You silently nod, putting your own palm around your mouth to muffle your helpless moans.

"I gotta ask, though. If you get horny this easy..." Jiwoo says midway, slowing down. "Why'd you pick a female coach?"

"Mmm. I–I didn't. When I saw the name, I thought—mmh! I thought it was a guy."

Jiwoo chuckles, picking her speed back up. "Sure you didn't just wanna look at girls in swimsuits?" Her other hand does a drive-by squeeze of your balls, letting a yelp slip through your guards.

"No! I–I didn't! I swear!" you whine, writhing under her touch. Jiwoo giggles, suddenly pumping you as fast as she could under the water before stopping abruptly.

You almost sob at the loss, your hips bucking towards her. "J–Jiwoo noona..."

"Be patient. I realized this isn't much different to you just jacking off, is it?"

You hum and shake your head. "It's–it's different when someone else does it." Jiwoo pouts and nods. "Still, I think we need to use a different approach." She shifts backward a few inches. "Approach to what?" you ask.

Jiwoo eyes you up for a couple seconds. "To making sure..." Her arms reach out to grip the pool edge, moving closer again. Under the water, your cock slides in between her meaty thighs, the latter squeezing you. " ...that you get properly drained before we start sessions in the future."

"N–Noona!" you squeak, your teeth chattering. Jiwoo sighs and closes her eyes. "Mm, you feel bigger between my thighs than in my hand. Wonder how you'd feel inside me."

"S–Sorry?"

Jiwoo's eyes open back up, her brows raised. Her mouth hangs a bit, her cheeks gaining some color. She seems equally flustered as you are, like she didn't mean to say it out loud.

"I, uh...never mind that. Just relax, don't be so tense. Can you do that for me?" You nod and breathe, gripping the pool edge hard as Jiwoo starts moving, sliding you between her. Your hand flies to your mouth again. The big, strong heft of her thighs is way more intense than her fingers, pushing you faster towards the peak. 

Jiwoo's face is also different. Her cheeky smirk doesn't hold up as well, her eyes not quite focused. Her breaths get louder, even letting a few noises through. She's getting off to this as well.

It's not too long until you're close, quivering and squealing louder into your palm. "Jiw—ahh. Jiwoo noona, I'm close, I'm gonna!" 

Jiwoo hums—almost moaning herself–and pulls away, leaving your cock throbbing in the water. You make an unrestrained whine, nearly sobbing. "Please, noona! I can’t hold on, let me cum..."

"I know, I know," she coos, looking around the water. "But we can't contaminate the water." Without further explanation, she takes a breath and goes beneath the surface. Your eyes follow her dark silhouette, moving closer and closer until it's almost right below you. Then you feel something around your tip; tight, warm, and textured. It's Jiwoo's mouth.

You wheeze in disbelief, your eyes locked onto the wavy, refracted image under the surface. Her mouth slides forward, taking more of you into her. Your loins are brought to the edge at lightspeed, and as soon as you hit the back of her mouth, you explode.

You cry out into the vast indoor space, writhing and arching your back as you flood Jiwoo's throat with your cum. She moves a slight bit, drawing out as much of your release as she can.

Now spent, you slide down weakly, likely would've gone underwater if your elbows weren't braced against the edge. Jiwoo pulls off of you and resurfaces, wiping her face down. She smiles with her mouth closed, then opens it to show your white seed sloshing inside. Closing it back up, she swallows everything in one loud gulp.

"Damn, rookie," she pants, wiping her mouth. "You came real fast, huh? So much of it, too."

"I, I, I..." you stutter. "I'm not...g–good with this. No experience."

"Virgin, huh?" Jiwoo raises a brow, biting her lip. "Not too surprised, actually. Hey, you taste pretty good, by the way."

You give a tired smile. "T–Thanks, noona." She nods and pulls herself out of the water, perching beside you. "How you feeling now? You think you could focus better like this?"

You pull yourself up also, though it takes greater effort. "I think...yeah. Probably." Jiwoo scoffs, leaning back. "I expect to see results next week, then. If it's ineffective..." She turns back to you, squinting slightly. " ...we're gonna abandon this exercise."

You straighten up and nod, putting up your fist. "I'll do better. You'll see better results next session, definitely!"

"That's the spirit," she chuckles, bumping your fist with hers. "Oh, by the way..." She glances down. "Your dick's still out."

You snap your head down, realizing you haven't put your trunks back on. You scramble to slide it up, shifting in bizarre ways to do so while sitting down. Jiwoo cackles at the sight, making you laugh along once you're safely covered again.