I'll Allow Up to Sex Friends
After Yuna left the room, only Sieun noona and I remained in the hallway.
Yesterday I'd left her covered in cum and gone straight to my room, but now she looked spotless. She must have washed up.
Judging by what she'd said earlier and the way she was looking at me now, her menhera mode seemed to have ended.
Whew. That was a relief.
Sieun noona's menhera mode was seriously annoying.
Now we could finally have a proper conversation.
Hmm… Should I bring up what happened yesterday?
Grumble…
…Food first!
Yeah. We could talk over breakfast. That would be plenty.
“Sieun noona. I’m going to eat breakfast. Want to join me?”
“Sure. What are we having?”
“Not sure. We can just throw something together with whatever’s in the fridge… Let me check.”
I opened the fridge and scanned the side dishes.
There were plenty of ingredients, but the first thing that caught my eye was fresh salmon.
Hmm… I’d expelled a lot of protein yesterday, so I needed to replenish some today.
Salmon rice bowl sounded perfect for breakfast.
“Sieun noona. I’m making salmon rice bowl. Want some?”
“Of course. I love anything you cook, Doyun~”
Huh. Sieun noona was always nice to me, but today she seemed especially sweet.
What was she thinking…?
…Well, there was no point guessing what someone else was thinking.
First, cooking.
Alright. Slice the salmon into bite-sized pieces…!
“Whoa… This is gonna be amazing…”
Ah… I was so hungry I could barely wait.
I grabbed the horseradish sauce from the fridge and dipped a piece of salmon in it.
Perfectly sauced salmon, ready to eat.
I popped it into my mouth, giving my growling stomach the nutrients it craved.

Mmm…!! Maybe it was because I was starving, but it tasted incredible!!!
I was tempted to skip the rice bowl entirely and just eat it like this!!!
“Munch munch… Wow… So good!!! Forget the salmon rice bowl—should we just have sashimi and udon instead?”
The rice bowl wouldn’t take long, but udon was just as quick.
We had all the ingredients ready: udon broth, toppings, frozen noodles.
Factoring in the time to boil the noodles… I could have everything ready in about three minutes!
Salmon rice bowl or salmon sashimi with udon.
I was seriously debating between the two when Sieun noona came up behind me and gently wrapped her arms around my waist.
She spoke while I was still cooking.
“Hehe. Doyun. I want sashimi too. Dip a piece in the sauce and feed me.”
“Okay. Here. Say ah~”
“Ah~”
I dipped a piece of salmon in the sauce and fed it to her.
Sieun noona smiled brightly as she ate.
“Mmm~ So good~ It tastes even better because you fed it to me.”
“Pfft. What’s that supposed to mean? Anyway, Sieun noona—which do you want? Salmon rice bowl or sashimi with udon? Pick one.”
“Hmm… I want udon and sashimi. It’s morning, so I’d like something with broth.”
“Got it. Then set the table while I cook. The noodles are frozen, so they’ll be done fast—probably three minutes total.”
“Yes, sir! Chef Doyun! I’ll follow orders!”
Sieun noona set out the utensils as instructed and started pulling out the rest of the side dishes.
Meanwhile, I took the frozen udon noodles out of the freezer and got started.
Udon was quick.
Once the water boiled, everything would be ready in under three minutes.
While the water heated, I prepared the sashimi.
I sliced the salmon into easy-to-eat pieces with a sashimi knife.
Sashimi wasn’t complete without raw onions.
I sliced those too.
I was the only guy in this house.
So I ended up doing most of the cooking and cleaning.
Thanks to that, I was pretty confident in my cooking skills.
Handling salmon and onions was nothing.
Hup…! Hyah hyah!
Just as I expected, the cooking finished quickly.
I arranged the sashimi in the center of the table with sliced raw onions and dipping sauce on the side.
Once I set a steaming bowl of udon in front of each of us, breakfast was ready.
I’d snacked on some sashimi while cooking, but I was still starving.
The moment I sat down, I took a huge bite of noodles and started eating.
“Munch munch… Mmm…!! This is so good!! Hehe. As expected of me, right? I did a great job~”
I opened my mouth as wide as possible and focused on filling my stomach.
Sieun noona, on the other hand, didn’t seem as hungry. She ate slowly, unlike me.
After a while, I started feeling pleasantly full.
Whew. Good. I’d successfully chased away the hunger.
Now that the food issue was handled, it was time to have the conversation I’d been putting off.
Sieun noona was still eating her udon.
I set my chopsticks down and spoke to her.
“Sieun noona. Honestly, I don’t mind having sex with you. Sex with a pretty girl like you feels good. I really enjoyed what we did yesterday. But marriage is off the table. If you want to be sex friends, I’m all for it. If you want to get married, I’m politely declining.”
“…”
This time, Sieun noona set her chopsticks down.
She stared at me in silence for a moment.
After a short while, she smiled softly, just like usual, and spoke.
“Doyun. I love you. Not just as family or as a little brother—I love you as a man. What about you? Do you love me?”
“I love you too, Sieun noona. You’re an incredibly attractive woman. That’s why we had fun having sex, right? But… marriage is a bit much. I don’t have a problem with incest, but that doesn’t mean I’m ignoring how society would look at us. I’m scared of the backlash that would follow if we got married.”
I didn’t have a strong aversion to incest.
Having sex with my pretty noonas was welcome.
But marriage was different.
It wasn’t just about legality.
If I married my family, the way society looked at us would change completely.
Even if living according to other people’s expectations was foolish, as long as I was part of society, I had to maintain at least some level of dignity.
“Honestly, who would know if we had incestuous sex? Only you and I would know. So sex is fine. It’s our little secret. But marriage? No. Marriage can’t be hidden, and eventually it would become a weakness that ruins our lives. I don’t want that.”
“…”
“Noona, you can love me. You can have sex with me. If you want, I’ll even do the domination play like last time. I enjoy having incestuous sex with you too. But marriage is a hard no. That’s the absolute rule I’m setting.”
“…”
“So… what’s your answer?”
“…”
Sieun noona went silent again at my question.
She tapped the table with her fingers, thinking for a long time.
Tap— tap— tap—
When the steady tapping finally stopped, she spoke.
“Doyun. Before I answer your rule, let me ask one question. Do you… really love me? If we weren’t siblings… would you have married me?”
“Yeah. That much is certain. If we weren’t siblings, I would’ve married you, Sieun noona. Because I genuinely love you and care about you.”
Truthfully, I felt similarly about my other family members too, but there was no need to bring that up now.
Better not say anything unnecessary.
“…I see. If we weren’t siblings… we could’ve gotten married…”
Another silence.
Sieun noona looked at me with an unreadable expression.
This time, it didn’t last as long.
She smiled softly, the same way she always did, and spoke.
“Okay~ Well, even if I can’t marry you, it’s fine. We can love each other and even have sex, so what’s the problem? Right, Doyun?”
“Yeah. No problem at all. As long as we don’t get married, I’m happy to have sex with you and do all kinds of perverted stuff. Oh, one more thing. Pregnancy is absolutely forbidden. Remember that, Sieun noona.”
“…Absolutely?”
“Yeah. Absolutely. You remember what I said yesterday, right? If you get pregnant, I’ll tell Mom and Chaewon noona everything, and I’ll never have sex with you again.”
“…Well. Fine. Let’s go with that for now~”
“Not ‘for now.’ This is permanent. Don’t try to sneak past the line I drew. You absolutely cannot cross this one.”
“Got it~ I won’t get pregnant, and I won’t bring up marriage either. That’s good enough, right?”
“Yeah. That’s enough.”
Whew. Thankfully, the conversation ended well.
I’d cleanly defined my relationship with Sieun noona.
We loved each other, but we wouldn’t get married.
We could do all kinds of perverted play and have sex, but pregnancy was off-limits.
An incestuous sex friend relationship where we relieved each other’s sexual frustration.
That was exactly what our relationship was.
It wasn’t the kind of relationship siblings should have, but I didn’t really care.
We’d crossed the line of incest, but we hadn’t crossed the minimum line humans should keep.
Yeah. Very satisfying.
With this, I could indulge my sexual fantasies without any fallout.
Sieun noona seemed eager to test our newly defined relationship.
Under the table, she pressed her bare foot firmly against my crotch.
“Hehe. Doyun. Want to pick up where we left off yesterday? I wasn’t in my right mind yesterday… This time I want to enjoy it properly… What do you think?”