"Geez! What's with the noise…" Karen stepped in behind Chiyo; her cropped top riding up to show a sliver of her toned stomach, her jean shorts hugging her hips.
She took one good look at the scene, then at the naked woman currently getting knocked, and something snapped.
CRASHHH!!
Like lightning she launched herself across the room.
Her foot pistoned toward Yuri's head, aimed to kill whatever escort her master had picked up.
But Yuri caught her foot in the air with a casual strength, her other hand braced on said master's neck, tangling his hair, as he slammed her from behind regardless of the current situation.
Even after catching the kick, Yuri's tongue was still out, her lips swollen, and eyes half closed in post-orgasm haze.
Karen hissed and leapt back, landing in a crouch like an angry cat.
Yuri came violently yet again.
Her pussy gushed around Rin's cock, a fresh spring of clear fluid soaking his groin and dripping onto the tiles. She moaned long and low, while her body shook.
Chiyo slapped both hands over her eyes; but her fingers parted instantly, peeking through the scene. Inferna and Munganda's expressions were carefully blank, but the sadness in their eyes was unmistakable. Karen only clicked her tongue at being completely ignored.
Rin finally calmed down, with his breathing ragged.
Yuri turned around and had her arms wrapped around his neck as his cock pulled out with a wet schlick. A line of bleached slime immediately drooled from her gaping entrance, splattering on the floor.
"Master… that was extraordinary," Yuri murmured, with a hoarse and feminine voice. She snuggled his neck like a clingy cat. "What is the term for this ritual?"
"Hm? Uhhh… it's called sex." Rin explained. "Well, it goes by many names; including copulation and fucking."
His tone had already flattened back to emotionless default, the raw hunger from seconds ago fading like the evening sun.
"Copulation?" Yuri tilted her head, cum still dripping from her chin onto her breasts. "Does that not refer to an act done by mortals for reproduction?"
Yuri pondered for a second, then blinked slowly. "Am I… going to bear Master's offspring now?"
"Slow down, you!" Rin snapped, shoving her face away gently but firmly.
Then he turned his neck and found Chiyo still peeking, her cheeks flaming red, and Karen crouched like she was about to pounce any second from then.
"Ah! Chiyo, I've warned you against watching lewd acts like this!" Rin suddenly lashed out. "You're still too young! Aren't you like thirteen or something—"
"Idiot! It's YOU who should stop with the immorality already! And you don't even know your little sister's age?!" Chiyo snapped back, her hands dropping from her face. "And who is this now? You picked up a prostitute or something? Or are you replacing your maids? And judging by her unusual eyes… She's not human, is she?"
Chiyo glared at the naked woman; her pale skin streaked with drying cum, her breasts heaving gradually, her thighs damp and trembling lightly, and her red-starry-night eyes still dazed with euphoria.
"…Meh. She's cute so it goes," Chiyo shrugged after a second. "You… What is your name?"
"I was born from void and used to be called Thrúiowre, meaning 'nothing'." Yuri said, snapping back to reality.
Then she suddenly sank gracefully to one knee despite more of the mess dripping down her legs. "But my Master has christened me Yuri. On the other hand, your form is most exquisite, ma'am. May I ask what your name is, and your relationship with my Master?"
Chiyo instantly flushed scarlet and thrust her hand out like royalty. Yuri took it gently and pressed a soft kiss to the knuckles.
"O-oh, aren't you charming," Chiyo stammered. "I'm Kiyoshi Chiyo. this pervert's younger sister."
"Ah, so you are an honored Kiyoshi?" Yuri smiled, a thin and polite curve drawing at her lips. "Then you must also possess extraordinary powers. Can you use sex at Rin's level too?"
"Wha—! Don't talk about sex like it's some sophisticated magic spell! And hey! Don't indoctrinate this cute girl with your filthiness!" She stood there with both hands on her hips, her cheeks flushed red, glaring straight at Rin.
Rin was slumped on the couch, cradling what remained of his favorite hoodie; now nothing more than torn fabric and loose threads hanging from his fingers like the corpse of some pet he once loved.
"Karen does not like you…" she whispered, planting one hand firmly on her waist.
Her fingers spread wide, with her posture was firm, and her green pupils narrowed into sharp horizontal slits as she stared Yuri down.
Her suggestive top rode up slightly with the motion, revealing a portion of her under boob.
"Pray tell, what is your relationship with my Master?" Yuri asked. Her tone remained calm, measured, and polite.
Those starry red eyes fixed on Karen without blinking, curiosity plain in the slight tilt of her head. She stood completely still and naked, dried cum still streaked across her breasts and stomach in pale, crumbly lines.
"Karen's not telling, baaaka!" She shot back instantly.
She stuck her tongue out in an inflated, mocking raspberry, then spun on her heel and dashed toward Rin.
"Rin-sama~" In one fluid motion she leapt onto his back, arms looping around his neck, legs wrapping around his waist. She shifted his face to hers, and pressed their lips together in a series of loud, wet kisses, sucking lightly at the skin. "Mmmph… mine!"
"C'mon, I just spent myself in that embarrassing display of carnal desire!" Rin whined. His voice came out thin and petulant, shoulders hunching as he tried to shrug her off without actually using force. His hands hovered uselessly in the air for a second before dropping back to his lap.
"…And Karen even went to the outside world so you'd praise her too…" she pulled back just enough to pout against his neck. "Rin-sama is a colossal idiot!"
She hopped off his back and walked in front of him, drew her leg back and then kicked his knee; sharply and aggressive, the heel of her sneaker connecting solidly, that a ripple of shock wave erupted—though he didn't react at all.
Then she superhumanly bolted down the hallway in a flash of green hair and jean shorts, disappearing around the corner before anyone could react.
Chiyo let out a long, tired sigh.
She rubbed her temple with two fingers.
"I actually dragged Karen out to go shopping for groceries," she explained, with a flat voice.