In the Snowy Mountains
Thud! Thud-thud!
I blocked the largest chunk with the Iron Wall Fortress and endured the rest with my body. My current endurance was at a level where getting hit by a speeding truck would only leave me dusting myself off, so it didn't hurt much.
After a moment, the impact faded. When I let go of Isis, she looked me over with concern.
"Luan, are you okay?"
"...I'm fine. Let's get to the shelter quickly."
"Yeah. I'll lead the way!"
Isis started moving toward the shelter again. I'd told her I was fine, but my body wasn't in great shape. The debris that had slammed into me seemed to carry some kind of special mana that penetrated through my thick winter coat and into my body.
With my stamina and endurance stats, I should've been perfectly fine even if buried in a snowfield in the middle of winter, but this cold was impossible to resist. Enduring the pain that felt like my blood was freezing, we finally reached the shelter.
The shelter was a deep tunnel dug into the ground and hardened into a cave-like form. Once inside, I could finally see Isis's face clearly.
"We're good. Luan, we're safe now!"
"That's a relie—"
Thud!
Mid-sentence, I couldn't withstand the cold that had seeped into my bones and collapsed.
'My body won't move.'
I tried circulating mana to drive out the cold, but it was useless. Instead, the cold spread through my mana all the way to my dantian, draining my strength just trying to shake it off.
As I trembled from the encroaching cold, Isis quickly lowered herself to meet my eyes.
"Oh no! You've been eroded by the cold?"
I had no idea what my face looked like right now. Without even diagnosing me, Isis had instantly recognized my condition the moment she saw me.
After checking me over, she bit her lip as if she'd made a decision, grabbed my clothes, and asked for permission.
"Luan, can I take your clothes off?"
"Ugh...! My clothes?"
"Yeah. If we're going to drive out the cold, nothing can be in the way. Is that okay?"
"......"
I stayed silent. Even speaking was difficult. I simply nodded quietly to express my consent.
"Thank you. Excuse me, then."
With permission granted, Isis thanked me and began removing my clothes. First, the winter coat came off. Then she started unbuttoning my dress shirt.
Click! Click!
One button after another came undone, revealing my firm chest. Isis kept her head bowed low as she stripped off the shirt. Her reddened earlobes told me she was embarrassed.
'I never expected something like this to happen.'
I knew her actions were purely for treatment, but I couldn't help feeling strange about it. What about Isis? Was she enduring the embarrassment just out of a sense of duty as my older sister, or were there other feelings mixed in?
If it was the former, I might have to apologize to her. Because I wasn't her real family, and ever since the possession, I'd only ever seen her as an attractive woman. Even now, if the situation allowed, I'd want to take her right away.
Amid my troubled thoughts, Isis's hands stopped.
"Done. Luan. I'll start the treatment now. I'll gather the cold with my mana and extinguish it. You have to stay still. Got it?"
"...Yes."
"Good. I'll begin."
Her face, which had been embarrassed just moments ago, now hardened with seriousness. She placed both hands on my chest. Her eyes closed.
Hum—
A brilliant silver mana bloomed from her palms, seeped through my skin, and spread throughout my body centered around my heart. Like a steadily flowing river, the mana moved without pause, surrounding the cold energy scattered everywhere.
Drip!
At that moment, a small sound rang out. When I looked at Isis's face, sweat was already pouring down like a waterfall. A bead of sweat rolled down her cheek, gathered at her chin, and fell to the floor.
It meant that controlling the cold consumed an enormous amount of mental energy. Watching her, I reflected on myself.
'I need to get stronger.'
Honestly, after gaining insight from the fight with Shakra and winning, I'd become a bit arrogant. I'd thought that because I was more talented and stronger than I'd realized, I could reach the ending without any major hardships. I'd foolishly held onto that hope. I'd forgotten that the Rape Declaration wasn't my true power but closer to a loophole.
In a situation like this, the Rape Declaration wouldn't help at all and couldn't become a breakthrough either.
While I was blaming myself, Isis finally succeeded in gathering all the cold that had penetrated my body into one place. She opened her eyes. She gritted her teeth, seemed to gauge something several times, then spoke with a troubled expression.
"Luan, I've succeeded in recovering all the cold for now."
"...I know."
"Yeah. But the problem is, I can't extinguish the cold with my power alone. I need yang energy."
'Yang energy?'
At the unexpected word, my head tilted. I didn't have any yang energy. Especially not the kind powerful enough to extinguish this intense cold. If I had, I would've driven it out myself without needing help.
Still, thinking she must have a plan, I looked at her calmly. Isis blushed and continued hesitantly.
"Um... don't misunderstand and just listen. You need to take off your pants. Everything, including your underwear. I-I'm going to neutralize the cold with semen."
"...What? Semen?"
I was momentarily shocked. So shocked that even though speaking had been difficult and I'd mostly stayed silent, I actually asked back.
Isis nodded as if she understood, while still explaining her reasoning.
"A man's semen is a resource where all yang energy is concentrated. With that, even powerful cold can be neutralized. Then we just need to expel it as is."
"...Is there no other way?"
"No. I'm sorry, but this isn't asking for your consent. Even if you say no... I'll do it anyway."
I could feel her resolve—she couldn't lose her precious little brother just because of shame. In front of that, refusal meant nothing.
'I wasn't planning on refusing anyway.'
The real Luan Priulri might've found it hard to accept, but showing my dick to Isis didn't bother me at all. In fact, I was a little excited, wondering how she'd react.
"Do as you like. I'm fine with it."
"Yeah. Thank you. Then I'll take them off."
Isis removed my pants while keeping one hand in place, probably to maintain control over the cold. Thanks to her high stats, she stripped off even my underwear in the blink of an eye without needing any help from me lifting my hips.
Finally, my cock was exposed right in front of her eyes.
"This is..."
Isis couldn't finish her sentence. The last time she'd seen Luan's dick was when they were very young. She must've been wondering if this was really the same thing. With a mix of reluctance and curiosity, she looked at my cock. Then she quickly came to her senses and moved her gaze from my dick to my face.
"Luan. I'll do it now."
"Yes. I trust you."
Maybe it was because she saw my calm expression. Isis regained her composure. She slid the hand that had been over my heart down across my abdomen and settled it on my lower belly. Then she reached out with her other hand and carefully wrapped it around my balls.
"Ugh...!"
"Luan, does it hurt?"
At my groan, Isis flinched in surprise and quickly pulled her hand away from my balls. I shook my head. It wasn't because it hurt—it was because it felt too good. The situation itself, Isis touching my balls to treat me, was too special. If I didn't get excited, I'd have to wonder if I was impotent. Still, moaning just from her hand touching my balls made me feel a bit pathetic.
While I was internally scolding myself, Isis confirmed there was no problem and carefully grabbed my balls again. Then she infused them with mana, creating a connection between the cold energy gathered in my lower abdomen and my balls. Along that path, the cold began moving into my balls and mixing with my semen.
"Luan, tell me if it hurts, okay?"
After giving that final warning, Isis slowly began massaging my balls. This wasn't foreplay. Though it stimulated and aroused me as if it were, her actions were purely for treatment. The careful massage and the effect of her mana helped the cold neutralize properly with the semen.
As a result, I was finally able to completely escape the cold's influence. At that moment, I had one question.
'But how is she going to expel it?'
The idea of neutralizing it with semen had been so shocking that I hadn't thought about it, but expelling the cold was actually the most important part. The problem was the word "expel." Generally, expelling meant taking something out of the body, and considering it was being neutralized with semen, there was only one method that came to mind.
With a doubtful feeling, I looked down at Isis just as she licked her lips with her tongue. Her red lips, glistening with saliva, strangely drew my gaze. She glanced at me sideways.
"Luan, I'm sorry."
Slurp!
With her apology, she opened her mouth and swallowed my glans. Her wet mouth enveloped the entire shaft, giving me a warm stimulation.
"Kuh...!"
A thrilling sensation ran through me. Isis, the undisputed number one in popularity rankings and an unapproachable character that even in the game no one had dared to pursue, currently had my cock in her mouth. No man in the world could stay unexcited by that fact. And we were siblings. Even though we had zero sibling affection, it was still something society said we shouldn't do. In other words, I could enjoy the sense of immorality without any rejection toward incest.
I felt like I could cum at any moment.
'I have to hold back.'
What kind of stupid behavior was this? I needed to ejaculate to completely escape the cold, yet I was trying my best to hold back my prostate because I wanted to enjoy the current situation a little longer.
Meanwhile, Isis, who had been getting used to my cock for a moment, slowly began moving her head.
"Chup... Chup! Churur..."
Every time the vicious shaft disappeared between her pretty red lips, pleasure that felt like my brain was burning took over my nerves. My waist twitched on its own, and my jaw trembled uncontrollably.
'This is driving me crazy.'
Isis's technique wasn't particularly skilled, but the fact that she was trying so hard for me was more than enough. About five minutes passed like that. Isis carefully spat out my cock.
"Luan, not yet?"
"...I'm sorry."
"No. You don't need to apologize. Anyway, what should we do?"
Isis's mana had its limits too. If this kept taking time, she'd lose control over the cold. While she was worrying, I casually made a suggestion.
"Noona. I have one method."
"A method? Will you tell me?"
Still gazing into her warm silver eyes, I made a request filled with 100% pure ulterior motives.
"Show me your breasts."