That pull-ring...
Protruding from that specific spot...
If her guess was right...
Gulp...
Orie instinctively swallowed her saliva. It wasn't that she didn't know what it was; as an editor who had read countless doujinshi, she obviously knew.
But... doujinshi are doujinshi, and reality is reality.
Bringing clothes from a doujinshi into reality just meant dealing with a higher level of shame. But those toys... could people really use them in reality? Has she been walking around with that inside her since this morning at Marin's house?
Ito-sensei claimed a girl's lower abdomen naturally has a slight curve... While that's technically true, the slight bulge in Sajuna's lower abdomen was absolutely not because of that!
It was bulging because it was stuffed full!
"That's right, what about it?" Sajuna kept a straight face, forcing herself to stay calm. Even if she was found out, her younger sister was right there; as the older sister, she couldn't show any weakness!
"F-For the whole day?" Orie asked cautiously. She was incredibly curious but also worried about offending Sajuna. Even though they were all girls, she couldn't just ask about something so shameful casually.
"Mmh." Sajuna tucked a strand of hair behind her ear and gently rubbed her stomach, pretending it was no big deal. "I've had them in since we left this morning. About... 20 beads, I think."
"Juju-sama, you're amazing!" Marin stared wide-eyed at the pull-ring protruding from Sajuna's ass. Although Marin and Sajuna had partied together before, Sajuna had mostly just watched from the sidelines.
Thinking back to the group shoot earlier, realizing Sajuna's body was stuffed with so many things filled Marin's eyes with admiration... As expected of Juju-sama, even her ass can swallow so many beads!
"Enough about me, what's that on you?" Sajuna glanced at Marin. "Why are you wearing a chastity belt?"
"Eh!?" Orie was momentarily stunned, then stared at Marin's panties. She had been so focused on their chests earlier that she hadn't noticed Marin's panties were locked!
"This? I recently awakened to a cuckold fetish, so I put it on." Although Marin was a bit shy, she was the legend who openly talked about R18 games at school.
She didn't feel the need to hide her fetishes... Back when she realized she liked being trained like Shizuku, she hadn't hidden it from Rin Ito either.
"You should know this, Orie. In doujinshi, a cuckold fetish is actually a pretty common kink."
"True... but that's common in doujinshi... Uh... Marin, isn't it uncomfortable wearing that?" Orie asked curiously. "Does Ito-sensei hold the key?"
"The key is with Kaede. She's his actual girlfriend, after all... she can unlock it remotely." Although she could talk about it casually, Marin wasn't entirely devoid of embarrassment. She guiltily twirled a strand of her highlighted blonde hair around her finger. "It was just a bit hard to get used to at first. This seems to be a high-end product; it's sturdy but doesn't chafe the skin... Once you get used to it, it's actually quite comfortable."
"But the main reason is to stop me from masturbating... Kaede and I agreed that we aren't allowed to masturbate until our next party."
"I... I see." Orie shyly pushed up her glasses... How is Ito-sensei's life even more thrilling than a doujinshi plot!?
However...
"You said you're not allowed to masturbate until your next party?" Sajuna pressed her lips together and frowned. "Then why did you organize this party... Ah, I get it."
Before she even finished, Sajuna figured out what Marin was plotting.
Perverted Nun is a reverse-rape game. Having Rin Ito get raped perfectly allowed Marin to roleplay the helpless, cucked wife trapped in a chastity belt.
"In that case, you just sit back and watch."
"Mmh mmh mmh!!!" Marin nodded vigorously. "This is my first time playing like this. I'm going to record everything on my phone! Then I'll send it to Kaede to watch."
This was Marin's first time participating in an NTR play. When she helped Saki Yoshida and her friend previously, Marin was just observing and helping to train them; she hadn't personally experienced reverse-NTR play herself.
Marin was different from Kaede and Ichika. Her NTR stat fluctuated below 50, placing her in the category of a mild enthusiast. This was essentially her very first cuckold experience.
"Hmph... Do whatever you want. Hurry up and change clothes."
Although Sajuna acted indifferent, having the pull-ring exposed was still intensely embarrassing. Urged on by Sajuna, the four of them quickly changed into the modified, high-slit nun habits.
Except for Marin in her chastity belt, Shinju and Orie both changed into the lingerie Orie had made.
Marin put her hands together in a pleading gesture and then walked into the confessional.
The confessional's structure was very simple: two small booths partitioned by wooden boards, with a small window covered by a black curtain between them. Aside from that, there was only a single chair inside.
"I'm inside~ Can you hear me?"
"Mmh, we can hear you."
The response didn't come from Rin Ito, but from Sajuna. On the other side of the partition, four people were currently crammed into the tiny confessional booth.
Rin Ito sat on the chair. Sajuna stood beside him, covering his mouth with her hand. Shinju stood behind him, recording a video on her phone, while Orie stood nearby, her face flushed red as she watched them engage in this reverse-NTR play.
"Then let's officially begin... Ahem." Marin cleared her throat, adopting a deeply pious tone. "Oh, lost lamb, what troubles your heart today?"
"Sister, I have something I wish to confess to the Lord," Sajuna replied, adopting the tone of a 'mesugaki' (a bratty girl).
"Please speak. As long as your confession is sincere, the Lord will forgive your sins." Marin's voice sounded incredibly devout, exactly like a nun from one's imagination.
Meanwhile, Rin Ito, with his mouth covered by Sajuna, was holding back laughter... Since this was a reverse-rape NTR play, he would just let them take the initiative today and see how they planned to play it.
"Aside from the Lord, I also want to know what you personally think, Sister. Is that okay?" Sajuna's tone was somewhat frivolous, resembling a mesugaki, but it was still within normal bounds.
"Of course."
Upon hearing Marin's response, the corners of Sajuna's lips curled into an amused smile. She made a 'shush' gesture to Rin Ito and delivered a classic line.
"Shh... You wouldn't want her to know you're here too, right?"
"Pfft..." Rin Ito almost burst out laughing. Although Sajuna was a girl, her petite figure meant that with a little makeup, she could easily pass for a young boy.
Her tone right now sounded exactly like a young boy 'driving a massive truck' in a shotacon NTR doujinshi, and Rin Ito was the 'massive truck'. This made it incredibly hard for Rin Ito to keep a straight face.
"Sister, if your best friend and your boyfriend engaged in erotic acts, what would you think?"