Seaside Frolic (5) (Illustration Spoiler Warning)
After sipping the tropical fruits and non-alcoholic cocktails that Eunbyeol had prepared, and devouring the hard ice cream packed in the cooler one by one with Do Sihee, she picked up the surfboard leaning against the parasol and stood from her spot.
"Now that my body's had plenty of rest, it's time to hit the waves again!"
Do Sihee's backside, with the surfboard tucked against her waist, was incredibly alluring, so I found myself blankly staring at her in the sunlight without thinking. Her wet hair still carried a hint of saltiness, and her back and hips flowed down smoothly without a trace of excess fat. It was more than enough to stir thoughts of a second round.
"Sihee."
"Yes?"
She turned her head toward me at my words.
"Since you're heading back into the water anyway, you should do some warm-ups again."
"……."
"Right?"
"Y-Yes, you're right. Warm-ups are essential before playing in the water…."
Like the bitch in heat she was, Do Sihee instantly caught on to what I meant by "warm-ups," her face flushing red in no time. Eunbyeol also began tidying up the various items laid out on the mat.
"You can leave it like that, Eunbyeol."
"Pardon?"
"Doing it under the parasol to avoid the sun is great, of course, but this time I want to switch up the stage a bit."
With that, I grabbed Do Sihee's wrist and led her to a spot on the beach a little closer to the sea, then laid the surfboard from her hand down on the sand.
"Get on your stomach on this, Sihee."
In truth, if I had the skills, nothing would be hotter than fucking her mid-surf, but there was no way I possessed that near-superhuman sense of balance. So, regrettably, this was just a way to play pretend—laying the surfboard on the sand near the water and doing it there.
"If you don't like it, we don't have to. If you don't want to do it on the board, we can just stand against a rock or something."
Of course, there was a chance this might taint her hobby, so I checked her intentions one last time. But…
"N-No, if Sungcheol wants it, I'd prefer doing it here too."
"Then get on your stomach quick."
"Y-Yes…."
Blushing furiously, Do Sihee carefully got on all fours atop the surfboard, her ass right in front of my eyes.

"And you've been flaunting this smackable, plump ass in front of me all day."
"I-I haven't been flaunting it…."
"And what's with this ridiculous amount of coverage on your swimsuit? No matter how I look at it, it just screams 'fuck me all day at the beach.'"
"…That's true, but…."
Smack.
"Haht!"
I gave the ass in front of me a light slap, prompting her body to prepare to take my cock. Whether it worked or not, Do Sihee trembled slightly and quietly blushed deeper.
I overlaid my upper body onto the blonde heiress's back and grabbed her breasts from behind with both hands.
"Hngh!"
"I told you, modest swimsuits are for women who lack confidence in their figures."
"Y-You did…."
"You're right, it makes sense when you put it that way. It'd be a shame for someone with your outstanding body to wear a one-piece or something frilly with lace."
"Th-Thank you, Sungcheol…."
"But don't wear it in front of other men."
I whispered that into the blonde heiress's ear and pinched both her nipples at once.
"Haht?!"
"Answer me."
"I-I hardly ever wear it in front of other men anyway, and guys who pounce just because a woman shows a little skin are rare outside of you, Sungcheol—hngh?!"
"I said don't wear it. Whether it's a ten-year-old kid or an eighty-year-old grandpa, whenever other men are around, wear a swimsuit with more coverage. Slingshots are absolutely forbidden."
"O-Okay. I won't show it to anyone but you, Sungcheol…."
"Good girl."
Satisfied with her response, I rewarded her by roughly kneading her breasts several times, then flicked her nipples lightly with my thumb and middle finger at the end.
"Hngiiih…!!"
Do Sihee let out a silly moan and leaned her upper body forward a bit. I lifted myself to shift my gaze to her lower half.
Just a single thin strip of fabric barely covering her pussy and asshole—it irked me, so I hooked my finger under her swimsuit and lifted it slightly.
"Mihht?!"
From the front, the swimsuit devoured into her mouth, exposing the mounds of her pussy lips outright. From behind, her pretty pink asshole was defenselessly bared in the sunlight. Since we'd slathered sunscreen everywhere inside earlier, at least this spot wouldn't burn and sting.
"A swimsuit that gets eaten up by your pussy lips with just a little tug, and you thought about wearing this in front of other men?"
"Hngh, w-wait a sec! If you pull it like that—mihngh?!"
"Hm? You won't wear it anywhere but in front of me, right?"
"N-No, I won't! I-I've never shown it to anyone but you anyway!"
"Good. Then we're done."
Twang.
The moment I let go, the black swimsuit snapped back, slamming into her ass crack.
"Hmiiyat!"
The elastic rebound must have hit her back hole harder, as the blonde heiress's ass flinched and clenched. This was kinda fun.
"Mihiiih…?!"
Her reaction was entertaining enough that I pulled her swimsuit up to the limit again.
"S-Sungcheol?! Wait, I need to mentally prepare…."
I released my fingers, and the slingshot fired off her lower half, striking her asshole hard.
"Hmiiiingh!!"
It was so sprightly, like she'd worn the swimsuit for this purpose from the start. For her, who'd grown used to ass cheek spanks, this was probably a fresh stimulus. If it were just painful or unpleasant, I'd have stopped after one, of course.
"Haa, haht, haaa…."
Her flushed face from this play, her ragged breathing, and her acquisition points that had already climbed to 60—all signs confirmed her arousal.
Bitches in heat are wired this way, huh.
"Sungcheol…."
Do Sihee turned her head carefully toward me, her face full of excitement and anticipation. Her eyes alone said she was ready, so I nodded lightly and hooked her swimsuit over her right ass cheek, exposing her pussy and asshole.

Damn, no matter how many times I see it, it's a gorgeous hole. Her two pristine openings were so perfectly maintained that I unconsciously wondered if chaebol heiresses even got their assholes professionally groomed. My gaze locked on them, and by the time I snapped out of it, I'd stripped off my swimsuit and was rubbing my cock against her pussy.
"I'm putting it in, Sihee."
I already knew from the slick fluids pooling at her entrance that permission was a formality.
"Y-Yes, please put it in…."
After hearing her final plea, I slammed my cock deep into the blonde heiress's waist.
"Ahiiiing…!!"
The instant my cock entered, she threw her head back with a long moan. Even though Eunbyeol must have cleaned her spotless, her pussy was drenched in warm juices. The semen I'd left deep in her womb and vagina earlier started leaking out bit by bit as my cock compressed it.
"Ahit! A-ahiiiing!"
This was only her second time getting fucked today, yet her reactions were this intense—it made pounding her all the more enjoyable for me. With every thrust, the cum still in her womb bubbled out, and I could even feel the slippery residue of the sunscreen we'd slathered everywhere earlier.
Smack!
"Hagiiiing!"
I smacked her ass lightly, commanding her to tighten up.
"Squeeze properly. It's so slippery I can't feel your pussy gripping me at all."
"Ahik! S-Sorry…!!"
Truth be told, gliding through her warm, slick vagina was pleasure enough to make me cum without issue. But if we were doing this, I wanted to feel every inch of her depths as vividly as possible. Her vaginal muscles clamped down harder at my words. Needless to say, it made my own climax build even faster.
"Ahiiiing! H-haht, haaaaiiing…!!"
"Sihee! Here it comes! Take it all again!"
"Yehes! Cum in me! Y-Your hot, thick load…! P-Put it all deep inside me…!!"
My cock, buried deep in Do Sihee's body, throbbed as it unleashed thick ropes of semen mercilessly into her womb. Just like before, she synced her orgasm perfectly with my release.
"Aahuiiiing…!!!"
With her waist bowed like a cobra and her upper body arched skyward, Do Sihee let out a drawn-out climax moan before collapsing forward onto the surfboard.
"Haa, hngh, ha, haeung…."
Two rounds already today. And if this vacation lasted through tomorrow, I could probably rack up four or five more point gains before leaving the island. So logically, calling it here and resting would be best for both of us….
"Haeung, ha, haaa…."
"……."
"Hau… hit?!"
My already aroused body and cock were still craving more of her.
"S-Sungcheol?"
"What are you waiting for? Spread your back hole."
It had been a while since I'd seen Do Sihee, so I wanted to indulge in the kind of sex only she could offer.