The Professor's Preference: Mermaid in the Tub
Before I knew it, the bathtub was completely full. The showerhead kept spraying water even while submerged, and every time Cha Eunyung and I moved even slightly, water spilled over the edge. Each time it overflowed, a loud whoosh echoed as it hit the bathroom floor.
Whether it was the buoyancy of the water or how light her body was, lifting her by the slender waist with both hands proved effortless. My cock, rock-hard from the excitement, stood ready beneath the surface. I slowly lowered her onto it, gripping her waist firmly.
Soon, her flustered voice rang out. "Ah... ah... Daddy? Haaah!!"
The water muffled most sounds, but the sensation was vivid. Her soft, slick folds wrapped around me completely. The sudden penetration made her back arch like a bow. Startled by the intense feeling in her lower body, she twisted beautifully, giving me a perfect view of her curved waist.
I lifted her again with both hands. Her body, coated in body wash, was so slippery that I had to grip her waist hard enough to leave marks. Once only the tip remained inside, I lowered her once more.
"Good girl... You're being so obedient, aren't you?"
"Ah... Daddy... It's too big... Haa... haaah! Ah... Daddy!"
Unable to resist gravity and my strength, she sank down quickly, driving my cock deep into her. As the massive shaft forced its way inside, she thrashed in the water. The soft brush of her legs against mine and the sloshing waves told me she was struggling hard.
Her entire body was slick with body wash, so every time she tried to stand, she slipped and sank back down. She grabbed the edges of the tub with both hands, desperately trying to pull herself up, but her palms were just as slippery. The more she struggled, the more water splashed over the sides.
Her pale body half-submerged, thrashing. Those startled sapphire eyes glancing back at me. The sight was unrealistically beautiful—like a legendary mermaid fighting to escape. But I had no intention of letting this beautiful mermaid go.
The only saving grace was that her resistance gradually weakened over time, likely thanks to the spray I'd applied earlier.
Splash...! Splash...! Splash...! Splash...!
"Haaah...! Hngh...! Ah... Daddy... haaah...! Just a moment..."
She still clung to the edges of the tub, but being held in place meant she couldn't rise. If anything, it made lifting her easier. I gripped her slender waist properly and began moving her up and down in earnest.
Splash...! Splash...! Splash...! Splash...!
"Haaah! Hngh! Haaah! Hngh!"
The water churned violently with every motion, spilling over like waves crashing on a shore. Between the splashing sounds came her seductive moans.
Her jet-black hair cascaded to her shoulders. Her smooth, pale back glistened. Each time I lifted and lowered her, her slender waist emerged from the water only to disappear again.
Splash...! Splash...! Splash...! Splash...!
"Haaang! Hngh! Ahh! Daddy... haaah! Hngh!"
My arms were starting to ache. Normally I moved my hips, but this time I was using my arms to piston her body up and down. Still, I couldn't stop. The mermaid before me was tempting me with her pale back, her slippery skin, those occasional sapphire glances, and the way her waist trembled whenever I thrust deep.
Splash...! Splash...! Splash...! Splash...!
"Haaah! Hngh! Hngh! Haaang! Haaang!"
Like a child playing in the water, her body bounced up and down, sending splashes everywhere. Her thin, pale waist kept appearing and vanishing. Whenever I thrust harder, it bent as if it might break.
Cha Eunyung possessed an unreal beauty. If mermaids truly existed, they would look exactly like her. Lost in these thoughts, I unconsciously tightened my grip and began shaking her more violently.
The motion grew rougher, and her legs started thrashing again beneath the water.
Splash! Splash! Splash! Splash! Splash! Splash! Splash! Splash!
"Haaah! Ah... Daddy! Hngh! S-slower... haa... slower... please... hngh!"
"Hah... Our daughter... haa... Can you be a little quieter? Haa... Daddy's... busy right now... hah..."
Gripping her pale, slender waist tightly enough to break it, I kept moving her up and down. After pounding her like that for a while, my cock finally erupted inside her, flooding her with thick white fluid.
Spurt.
Both of us went limp in the tub afterward. My cock remained buried inside her. Cha Eunyung lay against my right shoulder, her breathing tickling my ear.
"Haa... haa... haa..."
I caught my breath for a moment before standing up from the tub.
Whoosh...
When I suddenly rose, she tilted her head back to look up at me, her sapphire eyes filled with confusion. Staring down into those blue depths, I spoke.
"Be a good girl and suck Daddy's cock, won't you?"
"Ah... Yes..."
She adjusted her position, kneeling before me in the water. As the tub drained, the water level dropped to her waist. Her slim waist and pale breasts emerged above the rippling surface. Kneeling toward me, she hesitated, looking uncertain.
She couldn't bring herself to take my cock between her cherry lips right away. Smiling lewdly, I urged her on while gazing into her hesitant blue eyes.
"Good girl... Daddy's waiting..."
"Yes... Daddy. I... I understand..."
Finally, she leaned forward. My thick shaft—looking almost grotesque—slid between her beautiful lips. The warm, wet sensation enveloped me as she began sucking what had just been inside her.
Slurp... Slurp... Suck... Slurp... Slurp...
Her head started moving back and forth gently. I placed one hand on the wall and the other on top of her head. It was time to kindly educate my inexperienced daughter.
Slurp... Slurp... Suck... Slurp... Slurp...
"Eunyung... No teeth..."
I applied a bit more pressure with my right hand. Only a third of my cock had been entering her mouth before, but now it pushed deeper with each motion. Even as I increased the force, the "lesson" continued.
Slurp... Slurp... Suck... Slurp... Slurp...
"Use your tongue, Eunyung... Yes... just like that..."
She couldn't reply, but she understood perfectly. My cock no longer touched her teeth, and her tongue worked diligently inside her mouth.
Slurp... Slurp... Suck... Slurp... Slurp...
"Good... Keep going... Good girl... Haa... hngh...! Haa..."
She was following my instructions, but it still wasn't enough. Only half of my length was entering her mouth. Kang Dahyun took it all... The memory of Dahyun lying on the bed, swallowing me to the root with her throat bulging, flashed through my mind.
I moved my left hand from the wall and placed it on her head as well. Then, gripping her firmly with both hands, I pulled her forward and thrust my cock all the way into her throat.
A strange sound escaped her mouth. "Kuhk! Gurk! Kuhhk!"
"Haaah...! Open your throat, Eunyung... Hah...! Listen to Daddy... haaah!"
Her hands flailed, slapping against my thighs. Overwhelmed by my strength, she didn't know what to do. I kindly gave her instructions.
"Kuhhk! Gurk! Mmph!"
"Haa...! Don't bare your teeth... Just focus on that... Hah! Listen to Daddy, Eunyung... haa...! Good girl..."
I could feel her throat around my glans. With both hands, I forced myself deeper until the tip pushed into her narrow passage. I wanted to bury myself to the root in her mouth.
Now the warm, slick sensation wrapped around my entire length. Like dribbling a basketball, I began thrusting her head back and forth violently. After doing this for a while, I felt myself nearing climax again.
"Kuhk! Gurk! Kuhhk!"
"Hah! Hang in there, Eunyung... Just a little more... Haa! Good girl... hngh...!"
After shaking her head for some time, I stopped moving and pulled her all the way down, locking her in place between my legs.
"Kuhhk!"
"Hngh! Eunyung... I'm cumming... Haaah! It's a present from Daddy..."
I buried myself as deep as possible in her throat, savoring the tight, wet squeeze, then released thick ropes of cum straight down her gullet.
Spurt.
Even after finishing, I held her head in place for a long moment. Unable to breathe or resist, she could only weakly slap my thighs with her slender hands. Eventually, I pulled out so she could breathe.
Cha Eunyung gasped desperately for air. "Kuhhk! Kuhk! Haa... haa... haa... haa..."
But my hands remained on her head. I tilted her face upward so she couldn't spit out the cum, meeting her teary sapphire eyes. The tears made her eyes look even more beautiful—like the color of the ocean.
"Haa... It's Daddy's present... Don't spit it out... Swallow it..."
"...Gulp."
She obeyed. After the threesome with her sister, her attitude had become noticeably more docile. I released her head and gently stroked her hair.
"Good girl... You did well... Such a good daughter."
The next steps were obvious. Catching my breath, I finished the bath. I grabbed the showerhead again and rinsed both of us off, then took towels from the cabinet and dried her body carefully with my own hands.
Once we were done, I lifted her into my arms. My mind was already thinking about taking her again outside the bathroom. Supporting her back with my left arm and sliding my right under her knees, I carried her out. She was light.
Passing the sofa and table, I reached the bed and tossed her onto it. She landed on her side, her back facing me. My eyes traced her slender waist, her hips, her long legs... and the blue butterfly.
"Hoo..."
For a moment, I was speechless at her beauty. Under the fluorescent light of the studio, her freshly bathed skin glowed so white it was almost translucent.