"Guh... stop, stop licking. I... I want the real thing..."
Juju seemed unable to endure it much longer after only a few minutes. Shinju pursed her lips tightly, stopping her movements without making a sound. She turned her head, using her eyes to ask Rin Ito for his opinion.
As for Rin's opinion...
How could he let the older sister have her turn before the younger sister was satisfied? Naturally, the younger one had to be taken care of first.
Seeing Rin shake his head, Shinju ignored Juju's pleas and buried her face back into her sister's heat... Truthfully, she didn't want to stop either.
Shinju wanted to see more of this adorable, compromised side of her usually strict sister. Besides... she wasn't quite ready to hand "Brother" over to her sister just yet~
At this point, Juju was close to tears.
Wait... usually he doesn't like licking this much. Why is he so obsessed with it today? She didn't have much mental capacity left to ponder the mystery. Shinju lacked technique, but Juju was hyper-sensitive; her body's raw reactions more than made up for her sister's inexperience.
Meanwhile, Rin... Hiss.
The taste of Shinju's rear was truly magnificent.
Shinju was the tallest and had the largest rear among all the girls Rin knew. That soft, bouncy, mountainous ass... a single slap would surely feel incredible!
Rin felt a powerful urge to deliver a stinging blow, but he held back. Even though Juju was in a trance-like state, the sound of a heavy slap would be too distinctive.
He had to give Juju at least a thread of a reason to keep pretending she didn't know what was happening.
Rin was 90% certain she had already figured it out. Despite Shinju's best efforts, a stray whimper would escape, and the texture of her tongue was fundamentally different from a man's.
Most importantly... she could definitely hear the rhythmic sounds of Rin working on Shinju's rear.
Rin estimated that her request for the "real thing" was motivated both by her own desire and a desperate wish to stop her sister from being used right behind her.
As long as the noises stayed relatively quiet, Juju could continue her facade. After all, if the secret was officially out, she wouldn't know how to face Shinju. Rin decided to give her that shred of dignity.
He'd just continue quietly enjoying Shinju's massive rear.
"!!!!"
Unable to cry out, Shinju could only bury her face between Juju's cheeks, licking frantically. Operating on the principle of "fast and efficient," Rin didn't prolong the session. After twenty minutes of toying with Shinju's ass, he filled her to the absolute brim with cream puffs.
Shinju held her breath and moved aside, exposing Juju's sticky, petite rear to Rin. Both her cheeks and the area between her legs were a mess of Shinju's saliva and her own juices.
Rin hadn't dared to use much force before, but now...
SLAP!
"GUH-EEEE!!!"
Rin delivered a stinging slap to Juju's small buttocks. As the petite cheeks wobbled, droplets of moisture were squeezed out and dripped onto the sofa.
A big rear had its advantages, but a small one had its own unique charms~
"Since you want the real thing so badly, here it is!"
"My feet... my feet can't touch the ground!"
Rin gripped Juju's hips. To adjust the height, he practically lifted her entire body. With her feet dangling in the air, she could only brace her hands against the edge of the sofa. Her arches were taut, and her ten rounded toes were curled tight in tension.
The lack of solid ground triggered an instinctive fear and nervousness in Juju, making her already narrow entrance tighten even further. For Rin, it only enhanced the experience.
Beside them, Shinju watched the scene, instinctively swallowing. She covered her mouth with one hand while her other hand drifted down toward her own rear... Sister is so cute! Brother is toying with her back, so if I...
No, Brother has both hands on Sister right now. If I reach out, she'll definitely notice.
However... Shinju's eyes remained fixed on Rin.
Rin had been toying with her while she was licking Juju. Could she... return the favor?
With that thought, Shinju scurried behind Rin. If this were Ryo, Rin would be worried about a "One Thousand Years of Death" strike, but with Shinju, he felt safe.
Shinju knelt behind him and buried her face into his heat.
Hiss...
It wasn't his first time—Shion, Karen, and Eriri had all tried this—but the rarity of the experience still made Rin's scalp tingle.
Feeling Rin's body go rigid, a delighted Shinju buried her face even deeper.
"Guh... it's broken, it's broken, it's broken! My ass is going to break!!!!"
Rin toyed with Juju for over an hour, only stopping when her body gave a final violent spasm and she lost consciousness. Shinju, noticing the change, looked at the fainted Juju with concern.
"Don't worry, she just passed out from the intensity... I'll take care of her. Shinju, wash your face, clean yourself up, and head home. I'll carry her into the bedroom first so she doesn't see you when she wakes up."
"Mmm... O-okay."
Hearing Rin, Shinju hurriedly used tissues and wet wipes to clean herself. Rin scooped Juju up and carried her into the inner room.
Closing the door, Rin gave Juju's butt a light pat.
She didn't react.
"Stop faking. If you don't wake up, I'm turning the electricity on."
"Hmph... pervert." Juju opened her eyes and shot Rin a venomous look. She kept her voice low; the room was well-insulated, so Shinju wouldn't hear.
"It wasn't enough to toy with me? You had to bring Shinju into it too... you pervert." Juju crossed her arms, looking thoroughly annoyed. "When did you get your hands on her?"
"Actually, the very first time we met, she gave me a load using her chest."
"HAH!?" Juju instinctively covered her mouth. To her, Shinju had always seemed normal. She assumed their contact started after the studio dinners.
At the very least, she thought it happened after he drew those "Little-Boy-Big-Girl" manga!
"What kind of 'first meeting' was that!?"
"Didn't you join an orgy the first time you met me?" Rin teased.
"..." Juju's words died in her throat. Damn, he's right!
Eager to bury that memory, she shifted the topic. "You said you wanted to develop my rear so I could perform for her. Why didn't you tell me the plan beforehand!?"
"If I told you, your acting might have given it away. Today's performance was perfect. When did you notice?"
"Your tongue is rough; how could it be as delicate as Shinju's? At first, I thought it was another girl, but once I heard her voice, I knew." Juju let out a helpless sigh. "Is she confident now? Can I stop wearing the tail plug?"
"Denied~" Rin wagged a finger wickedly. "Is once really enough? It takes a few more rounds to build sufficient confidence in her."