Sajuna woke up.
She was woken up by the rain.
Ah, it was a strange... massive ass.
Opening her eyes, the sight that met Sajuna wasn't an unfamiliar ceiling, nor was it a familiar one—it was a pair of pale, tight, enormous buttocks.
"...?"
After a brief moment of daze, Sajuna quickly realized what was in front of her. She finally understood what was happening right now.
Shinju was currently on all fours over her, with her rear aimed directly at Sajuna's face. Behind Shinju was Rin Ito. For a moment, Shinju herself was dazed, letting the warm rain fall unchecked onto her face.
"Shinju, your sister is awake."
"Sister? Are you feeling okay?"
The voices of Rin and Shinju snapped Sajuna back to reality. She finally realized that Rin was busy doing something erotic with Shinju.
It wasn't the first time Shinju had seen Sajuna's body—she'd seen the front, the back, and even the inside—but it was the first time Sajuna had seen Shinju like this.
Previously, Sajuna had at most seen her sister's body during their occasional shared baths, but to see it from this angle, while being showered by her warm rain and getting such an exquisite close-up view, was a first.
Since Sajuna was awake, Rin wasn't going to hold back. Even when Shinju begged for mercy, Rin showed no tenderness; a lush, massive rear like Shinju's needed force to be truly enjoyed.
"Uu... Big Brother, g-gentle... please...!!!!"
"You bastard... didn't you hear Shinju tell you to be gentle?" Sajuna wiped the fluid from her face with her hand.
Sajuna's face was right beneath the crotches of Shinju and Rin. From her angle, she reached out and precisely gripped Rin's weak point, forcing him to a stop.
Looking at Sajuna's adorable, snarling face, Rin couldn't help but want to laugh. He gave Shinju's rear a light pat before speaking.
"Shinju, you tell me. Gentle, or with force?"
"Uu... more force."
Sajuna clicked her tongue and let go.
Hmph... has Shinju been brainwashed by him!? She's taking his side over her own sister's!
Feeling a bit piqued, Sajuna reached out and used her slender fingertips to gently pinch Shinju's most delicate nub.
Shinju's body wasn't as hyper-sensitized as Sajuna's yet, but being bullied by both of them simultaneously turned her protests into wanton, melodic moans.
"Uu...!!!"
With a sharp cry, Rin drove himself heavily into Shinju's rear. Sajuna held her breath, staring as Rin pumped load after load of cream puffs into Shinju's ass.
After the final jolt, Shinju went completely limp and sat directly down on Sajuna's face.
"GUH-MMMMMPH!!!!!!"
The petite Sajuna was pinned down, unable to move. Her brow, eyes, nose, and lips were all smothered by Shinju's intense female scent. The masculine scent of Rin Ito leaking from Shinju's rear also slid down onto her face.
But Sajuna didn't care about the smells right now—she didn't have the spare focus. Her pink eyes were starting to roll back.
I'm dying, I'm dying, I'm dying, I'm dying!!!!!
I'm going to be drowned by Shinju!!!!!
Sajuna opened her mouth like a drowning woman gasping for air, but all she sucked in was Shinju's fluids. Instead of finding oxygen, her frantic gasps stimulated Shinju further, making the younger girl's waist even weaker and more drained of strength.
Fortunately, Rin noticed Sajuna's plight just in time and lifted Shinju up, otherwise Sajuna really might have suffocated.
"Hah... hah..."
Unable to even wipe her face, Sajuna gasped greedily for fresh air... once she recovered slightly, she felt a wave of terror.
Suffocating from Shinju was one thing, but the worst part would be the news headlines: 'Sisters throw a party; Older sister drowned by younger sister's squirt.'
"S-SORRY!!!!"
Shinju hurriedly used tissues to wipe Sajuna's face. A recovered Sajuna shot Rin a murderous glare.
"She tells you to use force and you actually do it!? Pervert! You have zero sense of how to treat a girl gently!" Sajuna paused, guiltily looking away as she stuck her own rear in the air. "If... if you want to use force, use it on me instead."
"Pfft..." Rin and Shinju burst out laughing. It seemed she was already starving for it.
"What's so funny!" A mortified Sajuna lunged at Rin, but her tiny, slender frame was no match for him.
Rin soon had Sajuna cradled in his arms like a doll. Even though she was dying for it, Rin didn't intend to devour them immediately.
Toying with a tough, bossy sister like Sajuna was far more entertaining.
"Shinju, get the chastity belt. This wanton sister needs to be disciplined properly."
"Wh... what are you doing!? Shinju, don't listen to him!" Sajuna panicked. She'd already been through a week of abstinence. She'd just reached the peak a few times, but the only thing that had entered her front was a slender camera; it wasn't nearly enough.
"S-Sorry, Sister." Despite her apology, Shinju obeyed Rin and buckled the chastity belt onto Sajuna.
"Don't look at me with those scary eyes... Even though you're in the belt, I'm not a monster. I'm not going to force you into a whole week of abstinence." Rin suppressed a grin, trying to look professional as he waved the camera probe in front of Sajuna's eyes.
"Look."
The chastity belt wasn't completely sealed; it had small ports for toys. These holes were tiny—designed only for mounting devices or drainage—making "self-maintenance" nearly impossible with standard tools.
But the camera probe they had used on Sajuna earlier was different. While the handle wouldn't fit, the slender tip could probe right inside.
"You can use this for 'maintenance'."
Hearing this, Sajuna let out a small sigh of relief... at least it wasn't an absolute desert of abstinence.
Rin wasn't a monster, but he was no angel either. He handed the toy to Shinju.
"Big Brother...?" Shinju tilted her head.
"From now until the day of the convention, you are the keeper of this device." Rin gave a wicked smile, his gaze settling on the despairing Sajuna. Though he didn't say it aloud, Sajuna knew exactly what he was implying.
Pervert! This guy is an absolute demon!
Ignoring Sajuna's visual protests, Rin whispered into her ear with the voice of a devil.
"Whenever you can't take it anymore, just call for Shinju. Let her slide the camera inside and then... bilibili~"