However, Irina, raised in the Church and utterly ignorant of sexual knowledge, believed Kazuki's words…
"It might hurt or feel painful at first, but it'll start feeling good later, so bear with it. Alright, I'm going to move now?"
After that declaration, Kazuki placed his hands on Irina's hips and slowly began to pull out.
"O-Oh? Ooooohhhh!?"
At the sensation of his cock being dragged out with a wet, slurping noise, chills of pleasure raced up Irina's spine. He pulled out until he was nearly removed, then this time began pressing in slowly.
"Hyigu!? Ugu, ngii... fuu, nhoooohhh...!!"
As his cock sank back in with a squelching sound, Irina leaked a voice of sheer agony from the intensity.
'What is this...? When he pulls out, it feels good, but when he pushes in, it hurts so much... Aah, here it comes again...'
Alternating between the pain of her asshole being stretched open during thrusts and the relief of the foreign object being removed during withdrawal, Irina could think of nothing, merely letting out groans.
'Ah, I see. It's like the feeling when constipation finally clears...'
As the thrusting continued, Irina realized that the sensation of his cock being pulled out was like the blissful relief of a stubborn, hardened stool finally being expelled after days of constipation.
The instant she made that connection, anal sex became, in Irina's mind, not something to reject but a pleasurable act. And a change came over her body.
'What's this? The glide is gradually getting better...?'
With the secretion of intestinal fluids, the thrusting became smoother, and his speed increased. Irina's pained groans shifted into pleasured moans.
Now Kazuki was pounding her asshole at a pace no different from ordinary sex, and before long, Irina herself was moving her hips as if seeking the pleasure.
"Haa, aah... What do I do, Kazu-nii? I'm feeling good in my butt... aaahn, at this rate I'll turn into a pervert!"
Irina's ass rippled, and sweet cries of delight rose at this first-time pleasure.
"It's fine, Irina. Even if you're a pervert, I'll still love you. No, pervert might even be better!"
"Jeez, you're the pervert, Kazu-nii!!"
She had seemed so tormented just moments ago, yet now she had the composure to trade light teasing.
Surprised by Irina's transformation, but deciding it was all good if she was feeling it, Kazuki grabbed her boobs and launched into his final sprint.
"Haaoh! Ohhn! My butt and my boobs both feel so good! Aaahn, no more! Something's coming, something's cooomiiing!!"
At some point, a halo had appeared above Irina's head, flickering on and off repeatedly. Irina did not seem to notice, but Kazuki sensed the signs of her falling and hesitated for an instant. Yet—
"Like I can stop now! I'm going to cum, Irina!!"
"Aaaahn! I'm cummiiiiiing~~!!"
Splurt! Spurt! Splurt Splurt!!
"Nnhoohh!... My butt's insides are filling up with something hot..."
Shoooooooo—
At the heat of the semen spreading deep inside her ass, Irina shuddered all over, and as she let out a stream of piss, she climaxed, cumming hard.
'Whoa, so this is the real holy water...'
Entertaining stupid thoughts through his exhaustion, Kazuki gazed at the golden holy water—her urine—splattering the bath mat. Suddenly, the flickering of the halo stopped; it regained its light and then vanished.
Soaked in sweat, covered in tears and drool, Irina's expression was saturated with pleasure, and she somehow looked blissfully happy.
"Jeez, Kazu-nii, you're so forceful!"
"Sorry about that. But it felt good, didn't it?"
"Honestly... dummy."
Recalling the pleasure from just before, Irina's face turned red as she leaned back against Kazuki behind her.
Relieved that she hadn't fallen, the two had washed away the filth from their bodies and were now soaking in the hot water to soothe their fatigue. Irina leaned her weight onto him, and Kazuki wrapped his hands around her stomach to support her.
"Fufu, hehe..."
When Irina suddenly began laughing, Kazuki shot her a quizzical look.
"What's up, all of a sudden?"
"No... You know, I was supposed to be totally depressed about losing to Arthur just a little while ago, but I just felt like... it all became kind of trivial."
"Trivial, you say?"
"Yeah. I was worried about whether I'm okay as I am now, and what I should do from here on out... but after connecting with you, Kazu-nii, the person I love, it all just stopped mattering. Ah, of course, I don't mean I'm being reckless. I've realized that no matter how much I worry or hesitate, the only path for me is to keep moving forward. So I'll move forward. Even if it's a painful and harsh road, I'll walk it together with you, Kazu-nii."
Irina placed her hands over Kazuki's and gazed at him. 'Goodness...' While Yumi and Xenovia were still lost in their worries, Irina had already found her answer alone. Feeling her strength and purity, Kazuki was truly impressed.
"You're strong, Irina."
He tightened his embrace.
"Did you fall for me all over again?"
"Yeah. I've fallen for you all over again."
When Kazuki replied to her teasing with a perfectly serious face, Irina turned bright red and hung her head. The sight was illegally cute.
"Let's go forward together, Irina."
"Yeah, Kazu-nii. With you, I can go anywhere."
They gazed at one another and then pressed their lips together as if sealing a vow.
That night, the childhood friend Kazuki Fuwa, whom he had once regarded as a little sister, became his irreplaceable lover.
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