Depth Charge

Your muscles ache as you walk to the train station, effects of the first proper workout in a while. Your loins are aching with something else though. The entrapment of Jiwoo's thighs and the ridged warmth of her mouth left a burning desire within you, something you're determined to fulfill.

In all honesty, you weren't about to take this swimming course all that seriously. Just something to fulfill the mandatory 'personal exercise' slot on your report card. Lee Jiwoo flipped that lackluster will on its head, and you're now laser focused like you've never been with any physical activity before.

Besides the exercises she recommended to help you along, you do others as well. Swimming isn't the only physical skill you're trying to improve, after all. Ecstatic as you were to have an actual woman bring you to orgasm, you reached it concerningly, embarrassingly fast.

So you look up and perform all sorts of things; pelvic exercises, healthier foods that improve semen quality, and staying hydrated.

When the next lesson finally rolls around, you're well prepared. Jiwoo shows up in the same black swimming outfit that drove you crazy last week, though covered up by a loose grey sweater.

"Well, good evening," she greets you, smirking as she glances down at your bulge, already hard. "You ready for today, rookie?" 

"Absolutely." 

"Follow me."

You do the basic warming up exercises as before; stretching and breathing, mostly. Jiwoo then leads you into the shower stalls, nigh empty at this day and hour. Taking you into one, she closes the curtain and instructs you to sit down on the changing bench.

"So..." she licks her lip, eyeing your cock as it springs free from your shorts. " ...ready to focus?"

"Mhm," you nod, your cock twitching in search of her touch. She chuckles and wraps her hand around it, doing a few slow pumps that make you groan. 

"So damn eager for me, this guy'll need a proper draining." Jiwoo ties her hair in a bun and kneels, her breaths hot against your tip. She wastes no further time and takes you in, wrapping her lips around you.

You sigh and grunt as she engulfs the rest of your shaft, pressing her nose against your pelvis. Jiwoo moans and you can feel her relaxing her throat, accepting you just a little bit deeper.

She starts moving, her tongue flat against your underside. Her fingers work in tandem with her mouth, rolling pumps that stimulate you where her mouth isn't. 

Jiwoo maintains eye contact the whole time, raising a brow a couple minutes in. She hums around your shaft and your hips buck into her, making her gag and pull off.

"Fuck, you're eager. And...lasting longer, too. Impressive," she smirks, catching a breath. She goes again but harder, faster. "S–Shit, Jiwoo noona..."

Her tongue sits idle no longer, swirling around your sensitive head and slit, slobbering saliva all over her chin and making these nasty, lustful slurping noises. The raised intensity soon proves too much for you, feeling your release knocking on your doors.

"Ahh...noona, that's it, don't stop, don't stop, I'm so close," you whimper, holding on for a climax—that doesn't come. Jiwoo stops abruptly, squeezing the base of your shaft. 

You whine at the denial of your orgasm, holding Jiwoo's head. "Noona...why?" She stays right in place, not making any sound. Only after a whole minute does she release you, smirking. "Be...patient. You've lasted this long, you can go longer." The cycle restarts, working you right to the edge and stopping again.

You're practically begging at this point, shivering and whining needily. "Please, I wanna cum..." Jiwoo gets going again, a bit faster from the start. This time she doesn't stop, moaning and gagging on your cock as you're close to busting. 

When you cum, you do so with a broken sob, arching your back off the wall. Your release is explosive, pent-up from Jiwoo's edging. Heavy spurts of your spunk drench her mouth, some going straight down her throat.

Jiwoo hums throughout your climax, fluttering her eyes. She swallows in loud gulps with you still inside her, arousing you enough to squeeze out a little bit more cum, absolutely draining your reserves.

Both your breaths are ragged when she pulls off, though you're decidedly more wrecked than she is. 

Jiwoo smiles and wipes her mouth, rising to her feet. "Well? Got it all out...of your system?" she pants, licking her lips.

You offer a weak nod in response, your eyes half-lidded. "Good. Come on, we haven't even started yet!" She laughs and turns around, heading for the pool. You take a second and stand up, walking in tow with a slight twitch in your steps.