The First Breach

I pressed the tip of my finger lightly into the flesh of her ass and moved it around.

Springy, soft skin.

Kim Isol twisted her body nonstop, as if she could barely stand it.

"I-It tickles..."

"You'll have to endure it. This is to open the mana channels in this hole."

"If it doesn't go up, I'll bite your throat out."

"And if it does go up, what will you do?"

"......"

"Aww... should I stop?"

"Just say what you want first. You always want weird shit."

"You called me 'you' again. I always use honorifics with you."

"...Fine. Sorry..."

"It's all right. I like Kim Isol when she talks casually too. Just fix the way you address me."

"Yeah..."

What the hell.

I'd slipped in a line that basically meant I liked her, and that was the reaction I got?

I needed to tease her a little more.

I shifted my finger and slipped it right back between the cleft of her ass.

Just below the tailbone.

The way she kept writhing her hips without rest told me this spot was extremely sensitive.

"I'm going to touch it now."

"Hnn..."

Our breathing grew rough.

Mine and Kim Isol's both.

She was tense in her own way, while I felt a strange, heady thrill.

I'd been with quite a few women, but not a single one had ever let me touch her here.

Who would have guessed Kim Isol would be the first?

My finger, which had been stroking her tailbone, slid down between her cheeks.

It found that place again.

The tip of my finger felt the wrinkled ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠rim of her anus.

"Hieuk..."

Her whole body, arms locked around me, went rigid with tension.

Starting from her clenched anus, her pussy began to tremble, and she even held her breath.

I couldn't see her face from this position, but she was probably biting down hard and enduring it.

Tormenting her was genuinely fun.

Especially when she reacted like this.

Whether it was sweat that had run down her erector muscles, love juices from her pussy, or even my own cum, I couldn't tell—but her anus was slick.

I moved my finger and rubbed it lightly.

"Heuk... H-Hurry... put it in. Finish it!"

"I refuse. That would weaken the mana-boosting effect. It doesn't hurt, does it? It should just feel ticklish, so enjoy it. Tell me it feels good."

"There's... heuk... no way... it does..."

I brought my lips close to her ear and whispered softly.

"Mana grows better the more you enjoy yourself."

At the same time I slipped one knuckle of my finger back inside.

"Hwaaak—!!"

Just like before, her anus clenched hard.

Even the muscles of her ass tightened, the spread cheeks pressing together as if they meant to swallow my hand whole.

"Relax... It isn't even all the way in yet. There are people who have full sex with their asses, and you're acting like this over a finger."

"Heuk... L-Lies... haa, haa..."

"It's true. There are plenty of videos like that online. You never watch them?"

"Like I'd ever watch that..."

"For someone who says that, you got pretty desperate with me when you were drunk..."

"Don't... lie...!!"

Even after waiting a long while, she still wouldn't release the tension in her ass.

I had no choice but to pull my finger out and start massaging the whole area again.

We'd been clinging naked for so long that sweat kept pouring down.

Thanks to that I didn't really need lube, though oil would have been nice.

It would have made my finger slide in so easily.

"You're clenching so hard I can't raise your mana."

"Sorry... but it just happens on its own..."

"It's because you're tense. Come on, relax. Let the tension out of your stomach too..."

"L-Like this?"

"Yes, perfect. Lean on me comfortably. This damp feeling... aren't you sweating a little too much?"

"It's hot... But how long are you going to keep it in..."

I still had my cock buried deep inside her pussy.

The position made it natural to stay like that, and somehow I didn't want to pull out.

I'd already cum inside her anyway; there was no taking that back.

Besides, blood was already rushing back, restoring my size.

Her insides were stimulating me far too well.

"I don't want to pull out. Just hold on a little longer. Once I've finished raising your mana, I'll take it out."

"Okay..."

"Then I'll put it in again."

My finger had been massaging her anus the whole time.

Rubbing it while she relaxed seemed to be getting her used to the sensation.

I gently pushed my finger into her anus.

"There, there, don't tense up."

"Heuk... It's weird... this is weird..."

She wasn't completely relaxed, but she wasn't clamping down as hard as before.

The tension fluttered in and out.

Excellent progress.

"Hgeuk..."

She looked like she was struggling so much that I decided to use a little magic.

The usual kind.

I slowly withdrew the finger I'd inserted and raised her mana by one rank.

"Hwaaaang—!"

The arms wrapped around my neck pulled me in so hard I could barely breathe.

I could start to see how she was feeling.

Even so, I asked again.

"Should we stop?"

"More... put more in."

"What did I tell you to say when you ask me for something?"

"...Team Leader. Put it in again..."

"Yes. If Kim Isol wants it that badly, I'll put it in again."

"Yeah..."

I gathered the sweat and love juices around us, coated my finger, and pushed it back into her anus.

Very slowly, carefully.

The reaction wasn't as violent as before, but she still wasn't used to it; her pussy kept twitching.

Feeling the change in my cock, she breathed shallowly and spoke.

"Heuuk... W-What... is it getting hard again?"

"Yes. Isol's pussy feels too good..."

The moment I said the word "pussy," tension flooded back into her.

Anus and pussy both.

"Relax... I think my finger's going to break."

"S-Sorry..."

"I'm fine, but if you keep clenching like that you'll hurt your anus."

"Okay..."

She was growing more obedient by the minute.

Watching her take the humiliation of having her shameful anus toyed with while her pussy was stuffed full of my cock and cum, unable to refuse me, put me in a strange mood.

I pulled the finger out of her anus again and raised her mana once more.

"Heuut—!"

Whether she was breathing twice as hard now, her slender waist kept rising and falling.

That movement made the tip of my glans brush against the entrance to her womb.

My cock had fully recovered.

I decided it was time to change positions after so long.

My lower back was starting to ache from staying like this, so I lifted her and pulled out.

"I-Is it over?"

"No. I'm changing positions. Do you remember? The one we did last time."

"What...?"

"Cat pose. Get on all fours. Stick your ass out."

"...I hate this position..."

"Ah-ah! Mana!"

"...Fine."

In the end she got into cat pose.

The hole that had held my cock for so long was slightly open, and her bright-red anus came into view.

Against her pale skin it looked even redder.

I quickly opened the drawer of the nightstand beside the bed.

Condoms.

I pulled one out and rolled it onto the finger I planned to put in her ass.

A temporary measure for opening the rear when she hadn't been cleaned out.

Today was the first day, so I only intended to use a finger and test the waters.

Looking at her holes laid bare, I guided the condom-wrapped finger toward her pussy.

I scooped up a generous amount of the love juices overflowing from her and brought it back up to her anus.

The moment my finger touched the fidgeting rim, her anus vanished between her cheeks like a crab hiding its eyes.

"Still? Isol, please just relax a little."

"Eung..."

Carefully, my finger penetrated her anus again.

A raw sight I hadn't been able to see before unfolded right in front of me.

Whoa...

If it was pure tightness, this was on a completely different level from the front hole.

"Eugeuk... Y-You're too deep... It's hot..."

"Almost there. Hold on."

Seeing it with my own eyes gave me so much more information.

Clear liquid dripped stickily from her pussy.

Her lower belly was clenched tight, trembling, swelling cutely with every breath and then shrinking again.

The finger inside her anus felt hot enough to melt.

Before I knew it, my index finger had sunk nearly two knuckles deep into her.

"Heuk... This... is really weird... Take it out now..."

I slowly withdrew my finger and raised her mana another rank.

The hole that had been slightly spread by my finger snapped shut in an instant.

Thinking that was cute... I really am a pervert...

"Heuk... huk..."

Kim Isol's whole body was soaked with sweat as she gasped for breath.

What ran down from her ass over her thighs wasn't only love juice.

The lewdness of that rear view made me decide to go one more round, and I moved up behind her hips.

"Isol. One more time. You were drunk earlier anyway, so you don't even remember, right?"

"N-No. Doing it again..."

"Why not. Let's do it. I want to."

"But... if ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠we do it again..."

"Doing it again makes you even stronger. Look forward to it!"

"...Yeah. Aaah... hwaaat!"

Without a second thought I slotted my cock into her pussy.

It still clamped down hard, though not quite as fiercely as before.

Our synchronization rate had already passed fifty percent.

Touching her anus had been worth it.

One more round and even if a hundred percent was impossible, we might clear seventy, right?

My lower back felt ready to snap, but I had a secret weapon.

Power up!

This was already the third time with Kim Isol.

I could afford to get a little bolder.

I picked up the pace of my hips, faster than before.

With bounce like this, I wouldn't embarrass myself as a man anywhere.

"Heuk, heuut... haat, hnn..."

Sharp, high cries started pouring out of Kim Isol.

I was satisfied that she was gradually accepting me.

She didn't seem to be crying this time, and I even had the illusion that she was rocking her hips in time with mine.

"Huk... heok... Isol, this feels way too good."

"Heuk... huk... What... hyaat, are you... talking about. Haat..."

I snapped my hips and brought the condom-covered finger to her anus.

Then I started rubbing it lightly.

A violent contraction hit inside her pussy.

It squeezed as if trying to wring me dry, and a pleasure so intense it threatened to blow my mind washed over me.

Twice in one day and it was still like this.

What a terrifying woman.

And I'd even recovered my stamina on this side.

"Heuut... Anus... hwaang... don't... heuut... touch it..."

She bounced her hips in a way that didn't sound like refusal, and I raised her mana another rank.

Her mana had already climbed to E-5.

Whatever she'd been about to say vanished.

And just like that the urge to cum surged back.

"Huk... I'm... going again... inside..."

"Heup... No... heuk... not... inside..."

Mana up!

"Hyaaat! Aaang... I shouldn't... why... does my mana keep..."

Mana up!

"Hwaaaaang— It feels... too... good..."

Mana up!

"Haat... More... give me more... heuuang... haang..."

Her mana shot up to E-10 in an instant, and the constant, rippling squeezes brought me right to the edge as well.

This time I broke through the limit of her potential first.

At the same moment an enormous pressure clamped down on my cock, and I couldn't hold back any longer.

"Huk... huk... I'm cumming! Heuk..."

"Hwaat... hiyaaaaaaat—!!"

Pshuuuut! Pshuut, pshuut!

Heok... huk...

It felt like I'd emptied every last drop of cum left in my body.

My heart pounded so hard I could hear it in my ears.

The moment her limit broke, Kim Isol lifted her upper body, then collapsed onto the bed along with my orgasm.

She kept gasping for breath.

White fluid trickled out from between the cheeks of her ass as she lay on her side.

Ah, tonight really was something special.

Our synchronization rate had hit seventy-nine percent.

Just a few more times and we'd be there.

"Congratulations on becoming a D-class mana holder, Isol."

"Haa... haa... haa... Yeah... thanks... Team Leader..."

The way my eyes kept drifting to her chest, still heaving with rough breaths, made me think I'd been born a proper male after all.

What was a refractory period supposed to be?

Could I rest ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠a bit and go one more round?

I still needed one or two more to fully recharge my energy...

I gave a small shake of my head.

If I kept going I'd stretch that precious hole out, so better stop for today.

It wasn't like today was the only day, after all.

I finally managed to steady my breathing, grabbed a towel, and wiped her body down.

The moment I finished, I collapsed onto the bed myself.

We were both covered in sweat and needed a shower, but everything felt like too much trouble.

I rolled onto my side so our faces were close.

Drool had run down her chin, and sweat-matted hair stuck to her face, leaving her a bit of a mess—but she was still incredibly beautiful.

I couldn't hold back and kissed those bright-red lips once more.

Kissing her was still sweet, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠and still delicious.