"Mmm...."
Most of it was encased in soft, taut curves, with the tip being actively explored by a nimble tongue. Having seen similar scenes in doujinshi, Mashiro absorbed a lot of knowledge without needing much instruction from Rin Ito. Wet, sucking sounds echoed in their ears.
However, Mashiro's expression remained flat. She didn't find this kind of thing obscene, wasn't embarrassed, and didn't feel disgusted. Living in her world of art, Mashiro saw this as mere reference gathering, just another step in the painting process. Although Mashiro was inexperienced, she was diligently trying to recreate the scenes from the manga, noting the sensations to convey them to her readers for added realism.
Rin Ito instinctively guided Mashiro's head. Initially, Mashiro was just gently kissing with her lips and teasing with the tip of her tongue, but the next second... it was a good thing Rin Ito didn't lose control. The next instant, Mashiro distinctly felt the rhythm of life—once, twice... Rin Ito only released Mashiro when the rhythm ceased.
Mashiro slowly lifted her head. The tip of the barrier-spirit (condom) was swollen into a small sphere.
Holy sh*t....
Mashiro, accustomed to the volumes shown in manga, might not have thought much of it, perhaps even finding it lacking. But Rin Ito knew his own body best... What the hell is going on? Rin Ito had felt that something was wrong just moments ago; the duration and intervals were longer than before, and consequently, the volume was also much greater than usual. If it had only been a little more, Rin Ito wouldn't have noticed and would have attributed it to Mashiro's oral skills. But... Rin Ito estimated this was two to three times the usual amount.
It would be strange if Rin Ito didn't notice something so obvious. Something had definitely changed with his body recently. It wasn't worse; it was much better, a lot better. He had experienced a qualitative leap in both physical condition and stamina. Previously, due to long hours of drawing and lack of exercise, Rin Ito's physical state was actually below average. But now... not only was his stamina improved, but his physical fitness had increased significantly. He could stay awake for two days and still feel completely energetic.
Something was wrong, extremely wrong! Connecting this to what Mashiro said earlier—that his length and girth had increased... Mashiro had only been here for two days, and he'd noticed his improved physical state a few days before that. An unusual event must have a demon behind it!
Rin Ito recalled recent events. He hadn't fallen off a cliff and found a secret manual, nor had he been bitten by a destined spider recently... The most abnormal thing that happened was Kaede suddenly developing a kink for being cuckolded and becoming terminally obsessed with NTR. But he wasn't practicing Sexual Cultivation. How did his sudden physical improvement relate to Kaede's fetish? Furthermore, even if it were Sexual Cultivation, he would have been absorbing Suzu's essence, not Kaede's NTR obsession.
Strange... too strange.
While Rin Ito was contemplating, Mashiro had already removed the barrier-spirit and tied a knot in it, just like in the manga. Mashiro looked at the trophy in her hand and said flatly.
"Liar."
"Huh? What did I lie about?" Rin Ito was dumbfounded.
Mashiro held the knotted barrier-spirit up to Rin Ito. "You said doujinshi and reality were different, and that in reality, it would take two or three times to be as full as in the books. But this is fuller than the books, and it only took once."
"Then... again?"
"Mhm."
Mashiro took another barrier-spirit, one originally meant for Kaede, and this time skillfully used her mouth to put it on Rin Ito. Rin Ito didn't ask Mashiro to continue because he craved her lips. He wanted to test his body's limits, to confirm if there was indeed an anomaly and if he was truly stronger than before.
"Ahem, Mashiro, besides your mouth, you can also try using your feet."
...
Meanwhile, next door, Kaede was watching the feed from the Camera System. Kaede recognized the condom in Mashiro's mouth as one Rin Ito had bought for them to use together... I can exchange barrier-spirits for them, but he only needs condoms with me. He bought this to use with me....
Before long, Mashiro and Rin Ito finished the second one, and then the third... This time, Mashiro switched to using her feet.
STOP IT!!! Don't waste them!!! He bought those to use with me!!!!
Kaede was beyond tears... To be honest, while her upper two eyes were dry, the 'fountainhead' below was already welling up. At first, Kaede couldn't understand why they were wasting her barrier-spirits when they were only using their mouths, hands, chests, and feet. And Mashiro had already 'tasted' it yesterday, so using them again seemed illogical.
But soon, Kaede understood their motive from Rin Ito and Mashiro's conversation... Mashiro wanted to use the filled condoms to make a dress! When Kaede saw their receipt earlier, she wondered why they bought so many... Turns out they were for a dress. Kaede had seen similar play in doujinshi, but that kind of play usually involved many men, and Rin Ito was only one person!
System, won't his body break down if this keeps up? Although Kaede had enhanced his physique and increased his recovery rate, that receipt listed over a hundred boxes!!!! Over a hundred boxes!!!!
[The System cannot judge. If the Host is worried, you may continue to strengthen Rin Ito.]
Although today's Camera System rewards hadn't reset, Kaede had finished her daily tasks and had a few hundred Nurturing Points. A few hundred Nurturing Points would only add a few points to his physique at most; against over a hundred boxes, that would be a drop in the bucket.
[The Host can designate Mashiro Shiina as Female Cuckolder No. 2. After designating her as Female Cuckolder No. 2, the Host can use the exclusive Female Cuckolder Nurturing Points to strengthen Mashiro Shiina's Sensitivity, with the goal of weakening her by making her a 'Jobber'.]
[The more sensitive Mashiro Shiina's body is, the greater the stimulation she receives and the more stamina she expends. This way, Rin Ito can defeat Mashiro before his body gives out.]
"!!!!"
Kaede's eyes lit up upon hearing the System's prompt. Although Mashiro's progress was faster than hers, only Suzu was currently bound as a Female Cuckolder in the System. A delicate girl like Mashiro—if her sensitivity was increased, surely she would tire out even just using her hands, chest, mouth, and feet? Mashiro should tire before he broke down, right?
Kaede nodded thoughtfully. But... although the System's logic was sound, increasing Mashiro's sensitivity would also increase her own Temporary Sensitivity.
[The Host's sensitivity increase is merely going from 'Jobber' to 'More of a Jobber,' and it is only a Temporary Sensitivity increase.]
[If he breaks down first and is 'squeezed dry' by Mashiro, he might lose 'worldly desire' in the future from over-exhaustion.]
In simple terms... he'd get bored?
[Increasing Mashiro Shiina's sensitivity can also satisfy his masculine desire for conquest. Even if he loses and collapses from exhaustion this time, it won't affect his sexual appetite in the future.]
The System was right. She couldn't let him get bored with women.
It's decided!
Bind Mashiro Shiina as Female Cuckolder No. 2!