Leaving Suzu in the living room to assert Kaede's dominion, in the bathroom separated by a single wall, Kaede, as Rin Ito's official girlfriend, placed the 'unconscious' Eriri on the toilet seat.
A blonde eyebrow twitched. Eriri cautiously opened her azure eyes a slit, carefully observing Kaede. Kaede had her lips pursed, her expression awkward and flustered.
"Hey, no need to pretend... I'm sorry."
"!!!" I was... I was found out!!!!
Seriously... even if you found out, couldn't you pretend you didn't!? It's awkward for everyone if you say it out loud. However, with Kaede saying this much, Eriri had no choice but to open her eyes and face the embarrassment.
"I'm sorry, that... the prank went a little too far," Kaede said, guiltily averting her gaze, not daring to meet Eriri's eyes. Her ten toes were tightly curled up from the awkwardness. As a girl, Kaede knew how sensitive that area was. Kaede had only wanted to speed things up by having her spanked to climax, but she hadn't expected Eriri's reaction to be so extreme after the sensitivity was swapped with her butt.
"It's... it's fine," Eriri laughed somewhat awkwardly. "Um... it's my butt... that's too sensitive."
Eriri herself was startled. As far as she could remember, her butt had never been hit, not even by her parents. The most Eriri did when she was bored was tap it a couple of times while showering. The slap she received from Rin Ito just now... even recalling it made her shudder. The moment his palm landed, an unprecedented, extreme pleasure swept through her brain. It was beyond the level of the heroine being spanked to climax in a doujinshi. Eriri felt like her very soul and personality were about to leak out!
"I... I didn't even know my body was so..." Eriri subconsciously wanted to say nymphomaniacal, but the word caught in her throat when she realized she would be applying it to herself... Although her sexual preferences were far more extreme than the average guy, her body was still pure!!!! God knows why this happened!
The more Eriri said, the more guilty Kaede felt. I'm sorry!!! I'm so sorry for making you feel like your body is nymphomaniacal!!! Unable to tell Eriri about the System, Kaede could only apologize to Eriri in her heart.
The two fell into an awkward silence. The bathroom door wasn't soundproof, and they could hear Suzu's voice from outside, substituting for her sister at the party. Hearing the seductive sounds that the usually reserved Suzu was making, Eriri's heart felt ticklish... In Eriri's familiar manga terminology, Kaede was the clumsy, high-spirited cheerleader archetype, and Suzu was the cunning, emotionless girl. Eriri really wanted to see what kind of adorable expression the cunning, emotionless Suzu would make while having sex.
"Do you want to go?"
"I don't want to, I don't want to, I don't want to..." Eriri quickly waved her hands. No matter how much she wanted to see, she couldn't say it in front of his girlfriend...
Wait!!!!
At that moment, Eriri finally realized. Rin Ito was Kaede's boyfriend! Why is Kaede so calm about letting Rin Ito have sex with them!? For a moment, Eriri didn't know how to organize her thoughts.
"They... you..."
"What does it matter?" Kaede pretended to be magnanimous and said confidently to Eriri, "In the end, I'm still the one he loves the most!" I can't possibly say I have an NTR fetish, can I? Besides, I don't have this fetish! It's all the System's fault! How could I have this kind of fetish!?
"Ah, this..." Eriri's lips twitched, and she trailed off. Well played, Eriri thought. I see now. No wonder Nanami and Mashiro blatantly live at Rin Ito's house. No wonder Hinata Sakuramiya publicly claimed she was Rin Ito's girlfriend at the school gate. Everything made sense now. Kaede knew all along and allowed it all along.
"Besides... it just means he'll be more experienced, and I'll be more comfortable." Kaede continued to feign a nonchalant attitude, staring at Eriri's butt. "Otherwise, he wouldn't have made you react like that with just one slap."
"Ugh!!!" Only then did Eriri realize that her tracksuit pants and underwear had been pulled down to her knees the entire time, and her messy, wet area was constantly in Kaede's sight. Eriri quickly covered herself with her hands.
"Although there's a dryer, and they can dry quickly after washing, it's better not to wear them if you still want to join the research party." A hint of provocation flashed in Kaede's eyes. Having known Eriri since high school, Kaede knew her tsundere personality all too well.
Eriri gritted her silver teeth, putting on a fierce look. Now I know it. Her purpose in 'catching them in the act' today was just to target me! And she deliberately pulled down my tracksuit pants to let him spank my butt! Hmph... is she really that confident that she won't be cuckolded by those girls in a day or two?
In that case... Hmph! Eriri took a deep breath, meeting Kaede's gaze with the same look.
"Mhm, you have a point," Eriri said. She took off her tracksuit pants and underwear and handed them to Kaede. "Since you admitted it was your fault just now... then I'll trouble you to wash and dry my tracksuit pants and underwear! I'll go join the research session first and come home after my pants are dry."
It wasn't that Eriri genuinely wanted to cuckold Kaede. She had only met Rin Ito today; there was no such thing as love at first sight. But Kaede had just targeted her with the 'caught in the act' act; if she didn't do something, wouldn't she have been spanked to climax and lost control for nothing!?
Of course... she wasn't really going to do anything with Rin Ito. I'm just doing this for a small 'revenge' on Kaede.
Joining the research party could both exact revenge on Kaede and provide source material for her manga—two birds with one stone! That's right! That's the plan! Kaede deliberately scared me and made me lose control and climax from a spanking! Now, Kaede can wash the dirty pants herself!
"..." Kaede's lips twitched. She's going to the party, and I'm supposed to stay in the bathroom and wash her underwear!?
Kaede had felt guilty toward Eriri before, but now... Hehehe. I'll shove those sticky panties into her mouth someday! Besides the sensitivity exchange, there were many other enhancements from hentai manga that could be redeemed in the System.
Eriri quickly wiped her messy crotch with tissue, then stood up, adjusting the hem of her tracksuit. Just as Mashiro occasionally wore Rin Ito's shirt as pajamas or a dress when she was too lazy to change, Eriri's tracksuit was loose for comfort. Although it wasn't as oversized as Rin Ito's shirt on Mashiro, it worked perfectly as a super-short dress. As long as she didn't make any drastic movements, she shouldn't expose anything.
After giving Kaede a provocative look, Eriri left the bathroom. Tightening the hem of her tracksuit, Eriri walked toward the living room... What kind of expression will Suzu make when she climaxes?