Since Ancient Times, Sister Yuri Has Been Known to Be Delicious♡

While being impaled by Seol-hwa, I reached a single conclusion.

This game is being designed specifically to turn me into a female.

Doesn't it seem that way, no matter how you look at it?

First, the heroines suddenly turned into futanari and grew penises. Then, the affection system went haywire, causing the heroines to enter a state of estrus just by gaining or losing a tiny bit of affection. On top of that, they even suddenly incorporated one of the side characters into the heroine roster.

It’s a situation that would be hard to conceive unless the developer was truly determined to turn me into a female.

Just like right now.

"Nngghh-aaah!!♡"

Splurt-splurt-splurt—!!

That makes the tenth ejaculation.

Only after my stomach was swollen and bloated as if I were pregnant did Seol-hwa’s affection finally run dry.

It was only half a day after the sex started that Seol-hwa finally drifted off to sleep. Maybe it was because I had 30 hours of non-stop, sleepless sex with my mother last time, but I definitely didn't feel as exhausted as before. It was just the fatigue of having done it so much while already being quite drained.

"Huuuh…."

Once I pulled Seol-hwa's penis out of my vagina, I threw on some light clothes and dumped the sleeping Seol-hwa in her own house. I already knew the passcode from playing the ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠game, after all.

"I'm seriously going to die."

Just how much sex have I had in the past week? It made me dizzy to think that if this weren't inside a game, I would have already died from bokusanshi (death during intercourse).

"I should just hole up in my house today…."

If I walked around outside in this state again, I might get snatched up by some random NPC 1. If that person happened to be a man, it would be so horrific I wouldn't even want to imagine it, so… I decided to just stay put in my house today.

My mother had gone to work elsewhere and wouldn't be back for a while, and none of the heroines knew the password to my house.

'…By the way, what happens to my dad?'

Come to think of it, the existence of a father never seemed to appear in this game. I hadn't even thought to ask my mother about it during the game, and since it was a yuri game, there wasn't a single male character in the cast. In a way, it was only natural that I hadn't thought about it.

'…Does he not exist?'

If my dad were also a futanari and suddenly got incorporated as a heroine, that would be terrifying. I honestly hoped he just didn't exist. My mom is beautiful enough that it wouldn't matter, but… I didn't know if my dad was a man or a futanari, and I absolutely, under no circumstances, wanted to commit incest again.

'For now, let's just get some rest….'

I didn't have the energy to do anything else, so just as I was about to lie down on the bed—

Beep-beep-beep—

I heard the sound of my house passcode being entered.

Is it Mom? But Mom shouldn't be back yet.

I couldn't guess who it was, so I poked my head out of the room just a little bit.

"Big sister!!"

A pink-haired girl opened the door and walked in. Fortunately, it wasn't a face I didn't recognize. The girl was Baek Jiyoon, my younger sister in the game, an NPC who appeared with quite a bit of significance.

"What’s going on all of a sudden?"

"I came because I missed you, obviously! You haven't visited the main house even once since you started college!"

Jiyoon ran all the way from the entrance and hugged me.

"Do you know how much I missed you?"

She looked like a puppy; it was quite cute. If I had a younger sister with a large age gap, I felt like this is what it would be like. …I just hope she doesn't suddenly hit a route where she changes into a heroine.

"Sorry. Things have been hectic lately, so I couldn't visit."

"Mom said you seemed busy, so she told me not to visit often. But I wanted to see you every week!"

"It's okay to come visit if you have time. I'm not that busy…."

"Really?!"

Jiyoon beamed and jumped up and down.

"You're the best, Big Sister! I love you more than anyone in the world!"

"Whoa."

Are sisters usually this close? My real younger sister back in reality only ever nagged me to stop playing games. Jiyoon seemed to like me to an excessive degree.

'Well, at least it's a relief that we don't have a bad relationship.'

If we had a bad relationship… because of that crazy developer, any little thing would cause my affection to drop and convert into excess affection.

"By the way, Big Sister, you seem to get prettier every single day since you started college!"

"I, is that so…? I don't really know…."

"Yeah. You've become totally beautiful!"

Looking at my body, it seems true that I'm lewd, but since I don't look in the mirror often, I don't really know if I'm pretty.

"Big Sister. Anyway, I'm hungry. Can you let me eat something?"

"I can, but… is there anything you want? I can order delivery if you want…."

"Nooo. Not delivery food."

Jiyoon giggled and pulled something out of her pocket.

A single red thread.

She said she wanted to eat something, but she suddenly pulled out a thread. A sinister feeling washed over me, and I stepped back slightly.

…How is it that I never manage to avoid these ominous feelings?

Damn that developer bastard.

"Big Sister, come here…♡"

Jiyoon, who had already fashioned a rope out of the thread, began to approach me slowly. Under her skirt, her penis was standing tall.

"J-Jiyoon…? Big Sister didn't intend for this to happen…."

"What are you talking about? You're dressed so lewdly, and you're even leaking semen… it's only natural that I can't hold back, right?♡"

Ah.

Come to think of it, I hadn't washed yet, so the semen was still leaking out. I really got myself into a proper mess this time.

"Big Sister, I even brought a bunch of items for you!"

"I, I don't think I need those…."

"No. These are items you’ll definitely need, Big Sister♡"

Whoosh!

Jiyoon, who had tied my wrists with the rope before I knew it, said:

"These are items to make you feel good, Big Sister, since you must be stressed from college life. Teehee♡"

"B-Big Sister doesn't need things like that! I'm really not stressed…!"

"That can't be true."

Perhaps because she was in a state of estrus, Jiyoon had no intention of listening to a word I said. It would be so nice if she would just listen to me for once.

"Big Sister is really struggling right now…. Please, just let me off this once. Okay?"

I tried to use my charm to get her to let it slide, but—

"Big Sister."

"…Yes?"

"Do you really think I'd listen when you're asking so lewdly?"

…As expected, I failed. Of course I did. Because the developer’s brain is filled with nothing but female-corruption.

"Just quietly accept the cock like a female…♡"

"Seriously, please, can't you do something about this…?"

"No."

"Huuuh…."

A sigh escaped me at the sight of a situation with absolutely no answer. Yeah, well. If I just have sex like usual, I'll be able to rest eventually… I was thinking that when Jiyoon pulled something else out of her other pocket.

A single small pill.

My spine began to chill at the color and shape of the pill, which I had seen all too often in adult webtoons.

"……Jiyoon."

"Yes?"

"That's not it, right?"

Jiyoon didn't answer. Instead, she smiled ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠at me as if to say yes.

'Wow.'

I'm properly screwed.

"Don't worry, Big Sister. I learned how to not kill Mom from bokusanshi♡"

"No, no, no. Jiyoon, that's not it. Let's stop right now."

"Since ancient times, sister yuri has been known to be delicious♡"

With her pupils distorted into hearts, she tossed the pill into her mouth and ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠then pressed her lips against mine.

"*Slurp*, *slurrrp*♡ *Smooch*♡ *Chu*, heee—♡"

Because Jiyoon forcibly pried my lips open with her tongue while kissing me, I had no choice but to swallow the pill without being able to resist.

Gulp.

"Hah, haaaah…♡ Ugh♡"

As the pill was swallowed, my whole body began to heat up. At the same time, my lower abdomen throbbed, and between my legs, it became soaked as if a flood had occurred.

My head was spinning. My vision blurred to the point where I couldn't even see the messages in front of me properly. In that blurred vision, only one thing was clearly visible.

Jiyoon's penis, which was fully erect and dripping with pre-cum.

"C-cock…♡"

My legs gave out, so I collapsed and slowly crawled toward Jiyoon. Then, slowly, I went under Jiyoon's skirt and began to rub my nose against it, sniffing the scent of Jiyoon's penis.

"*Sniff*, haaah…♡ Nngghh-uuuh♡"

Pshhhhh—

Is it because of the aphrodisiac? Because my entire body was several times more sensitive than usual… my body, having inhaled Jiyoon's male pheromones, spilled out a fresh wave of love nectar.

"Geez, Big Sister. Even if I fed you an aphrodisiac, how ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠can you just climax like that?"

"But, the cock smell is so good…♡"

As I kept rubbing my nose against her penis and sniffing, Jiyoon stroked my hair with a satisfied smile.

"Big Sister."

"Eh, heee…?"

"I'm going to properly break you in as a female from now on♡"

I should have hated hearing that. I really should have.

For some reason, my body spread my legs wider on its own, and I used both hands to spread my labia as if begging her to put it in.

"I-it feels good…♡ Break me in properly…♡"

…I don't even know anymore.