Chapter 6

“What did you say earlier? The breasts?”
“…I’ll take over.”
As expected, she’s a smart kid. She doesn’t forget what she was taught.
Chaeyoung started touching her own breasts. Right in front of me. She rubbed her breasts with both hands and pinched her nipples.
I watched that scene while moving my hands.
With my right hand, I held and rubbed the dick, and with my left hand, I went down to that secret place below.
The fingertips of my left hand touched the precious part. Along with soft hair, tender flesh was felt.
It was warm, and wet. She was properly warmed up.
I pressed it gently with my fingertips and moved slowly. I was hesitant to touch it strongly. Because I knew it was the weakest part of Chaeyoung’s body.
“……Heuk……!!”
Chaeyoung’s breath burst out. Sensations were coming from above and below at the same time.
The male pleasure coming from the dick side, and the female pleasure coming from the pussy side, together.
For me, only the sensation from my right hand came. The familiar feeling of holding and touching the dick.
But the sight in front of my eyes brought excitement that couldn’t be explained by that alone.
Lee Chaeyoung’s back arched. Both hands gripped the blanket tightly. Moisture gathered at the corners of her eyes.
Right hand up and down. Left hand drawing ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠circles.
Because the two rhythms were out of sync, Chaeyoung’s body shook, not knowing where to focus.
“Ha, ah…… Oppa, this, this is too, too…!”
“How is it?”
“I don’t know, what’s what…… Ah, aang……!”
As if it didn’t matter that she didn’t know, Chaeyoung threw her head back. Her white neck was revealed. She clenched her teeth, but sounds still leaked out.
I was also feeling sensations rising. Little sister’s extremely lewd appearance was pouring fuel on my excitement. Right now, I was masturbating while watching her.
The sensation of the dick being touched by my right hand spread from below my stomach up my spine. Even though there wasn’t one, an imaginary dick was throbbing.
I increased the speed. Both sides. The pussy that I had touched carefully at first was now being rubbed as if trying to start a fire.
“Oppa, oppa……! I, this—?!”
It’s coming up. I knew it from the sensation.
It was rising on Chaeyoung’s side too, and on my side too.
Chaeyoung’s thighs trembled. Her stomach tensed up completely. Her cute navel became hollow. Her breathing stopped, then burst out.
“Oppa—!”
Climax arrived. Both sides at the same time.
It spurted from the dick. Onto Chaeyoung’s stomach. Onto my hand.
At the same time, from below too.
Chaeyoung’s thighs clamped my left hand tightly. Her whole body convulsed.
The sensation of ejaculation poured over me too. My vision went white. I clenched my teeth.
My hands were wet. Both sides. Male fluid and female fluid spurted from both.
“Haaaaah…!”
For me it was only the pleasure of ejaculation, but Chaeyoung must have felt both at once. By simple calculation, twice as much as me. Even I was out of my mind, so the shock Chaeyoung received must have been incomparable.
For a long time.
Both of us couldn’t move for quite a while.
Chaeyoung was breathing roughly. Tears flowed from the corners of her eyes. Sweat soaked her whole body. The fingers gripping the blanket had lost color.
It took me time to catch my breath too. Even though I didn’t ejaculate directly, just the transmitted sensation was this intense. For me too, it was a shockingly pleasurable masturbation session.
Only rough breathing remained in the quiet room.
After a long while, Chaeyoung spoke.
“……Oppa.”
“Yeah.”
“Is this what masturbation is normally like?”
No. Absolutely not.
“……Well, something like that.”
Chaeyoung was lying limply on the bed, staring at the ceiling. Her body was still trembling.
“……I thought I was going to die.”
“But you’re still alive.”
“Yeah…”
It was a small answer. But there was laughter mixed in her voice. The laughter that comes from exhaustion.
I pulled out some tissues and wiped Chaeyoung’s stomach. And my hands too. Both hands.
Chaeyoung was lying still with her eyes closed. Seemed to be processing what just happened.
On big brother’s bed, receiving masturbation from big ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠brother, reaching climax while calling big brother.
After growing up, we couldn’t really be said to have a good sibling relationship. We did something siblings should never do, but somehow it felt like our sibling bond became closer.
Chaeyoung opened her eyes. Looked up at me. Eyes were wet.
“……Thank you for keeping the promise.”
Lee Chaeyoung said thank you. To me. For masturbating her.
The eyes looking at me were pretty.
“Well…… it’s my dick after all. I have to take responsibility and do it.”
That was the only way I could answer.

After washing my hands and coming back, Chaeyoung was still in my room.
And completely naked.
She was standing in front of my desk, rummaging through the shelf. With nothing on.
Her back was visible. The waist line. Below that, round and cute buttocks. And below that, something else could be glimpsed.
“……What are you doing?”
“I was seeing what’s in oppa’s room.”
She answered without even turning around. As naturally as if she were wearing clothes.
Just thirty minutes ago she was reluctant even to take off her pants.
“You’re not going back to your room?”
“Nope. I’m going to stay longer.”
The tone wasn’t asking. It was a declaration.
Once Lee Chaeyoung decides something, it doesn’t change. It’s been like that since long ago.
“What’s this book? Is it interesting?”
She took something out from my bookshelf.
She lowered her head and turned the pages; from behind, it just looked like a naked woman standing there.
In my room. In her natural state.
Adaptation is scary.
Lee Chaeyoung had already adapted. To being naked in front of oppa. In less than an hour.
Should I adapt too? My eyes were still drawn. From back to waist, from waist to below.
“……If you’re going to ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠look, sit and look. Standing will make you tired.”
“Yeah.”
Chaeyoung naturally sat on my bed and opened the book.
Legs folded position. The dick was calmly resting on top of her thigh. It was calm now. Of course, after cumming so much earlier.
I sat on the desk chair and looked at my phone.
A strangely peaceful time passed.
Naked little sister reading a book on my bed, me looking at my phone in the chair.
It’s a weird picture, but strangely comfortable. Somehow natural. As if it had always been this way.
About twenty minutes passed like that.
“Oppa.”
Here it comes. I somehow knew it would.
“Why again?”
“We rested 30 minutes, so it’s fine now, right?”
What was fine didn’t need to be said.
“It hasn’t been 30 minutes yet.”
“It’s almost there.”
Chaeyoung closed the book.
Her eyes had switched to that mode again. Eyes expecting something from me.
But I shook my head.
“No. The dick doesn’t recover that fast. Normally morning and night, two times a day is the limit.”
“Only two times? Seriously?”
“Yeah. More than that puts strain on the body.”
It wasn’t a lie. For a healthy adult male, about twice a day is reasonable. But today it seemed we had already exceeded that amount by about three times.
Chaeyoung’s lips pouted. It was the first time I’d seen Lee Chaeyoung pout like this since elementary school.
“Then…… today is over?”
It was a pitiful voice. The kind of voice that makes you want to grant the request if you possibly could. Even though the content was absurd.
I thought for a moment.
The dick really needs rest. It’s been overworked since yesterday.
It’s my thing, so if it gets abused, I’m the one who suffers.
However.
“Want me to do it with something else instead of the dick?”
“……Something else?”
“Breasts and pussy. Let the dick rest, so leave it alone.”
Chaeyoung’s eyes widened.
“……That’s…… not masturbation, is it?”
Accurate point.
We agreed to do dick masturbation, but if we exclude the dick, then it’s not masturbation. What should it be called?
“Broad sense of masturbation.”
“Broad sense?”
“Yeah. Masturbation originally includes any part of the body. It doesn’t have to be only genitals.”
This is actually true. By definition.
Chaeyoung pondered for a moment. I could see that smart brain working. Verifying if there was any flaw in oppa’s logic.
“……Does it feel good?”
“You felt it earlier when only the breasts were touched, right?”
“That’s true, but.”
“It’ll be weaker than when doing both at once. But still enough.”
Lee Chaeyoung bit her lip. Pretended to hesitate. But the answer was already decided.
“……Okay.”
She put the book aside and lay down on the bed. Naturally. Unlike earlier, there was no hesitation.
I sat beside her. Looked down at Chaeyoung ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠lying there.
On white skin, only the dick looked out of place, standing up. Everything else was little sister’s body.
First, I placed my hand on those pretty breasts.
“……Eung.”
Lee Chaeyoung closed her eyes. The body that still remembered earlier reacted immediately.
I touched slowly. This time I took more time than before.
Covered them completely with my palms, drew circles with my fingers, and every time I touched the tips, Chaeyoung’s breathing shook.
Then I brought my mouth to those breasts.
“Wait, oppa, what are you—?”
“This is something people normally do too.”
“With your mouth?!”
“Yeah.”
It’s true that it’s something normally done. Not in masturbation, but in other acts. But Chaeyoung probably doesn’t know.
The moment it touched, Chaeyoung’s back lifted.
“Ah……!”
I lightly bit the nipple with my lips, licked it with my tongue. I could feel the slender body flinching.
I put pressure in my mouth and sucked. “Haaang…!” Chaeyoung let out a breath.
It must have been a completely different texture from a hand.
Warm, soft, moist. Chaeyoung’s hand came up on top of my head.
Unclear whether she was trying to push away or grab, the strength.
She didn’t push away.
The other side too. Alternating. Chaeyoung’s breathing grew rougher. Her waist was moving slightly.
When I thought it was about time, I lowered my left hand.
This time she wasn’t surprised. Because she had experienced it once earlier.
Her thighs spread on their own. Unconsciously, or consciously. As if that body wanted my touch.
Fingertips touched the precious place. Wetter than earlier. Chaeyoung. Was feeling it toward me.
“Ha…… Eung…….”
Lee Chaeyoung gripped the blanket.
Above, mouth; below, hand. Strong sensations coming from two places at once.
The dick was twitching beside, but I left it alone. Today is a rest day.
“Oppa…… Oppa…….”
Chaeyoung called me.
Eyes half-closed. Focus blurred.
Not as intense as when doing both at once earlier, but a different kind of pleasure was building. Slowly, deeply. Purely female pleasure.
I increased the rhythm of my left hand. Sucked the nipple harder.
“Ah, aa…… Oppa, I, I……!”
Chaeyoung’s thighs trembled. Stomach tensed. The hand holding my head gripped tightly.
“Oppa—!”
Climax came.
This time it wasn’t ejaculation. Purely the female side.
Chaeyoung’s whole body shook. Thighs clamped my left hand.
Her back lifted sharply then sank back onto the bed.
This time, no ejaculation sensation came to me. Obviously. Because I didn’t touch the dick.
But watching Chaeyoung’s body tremble, hearing her call my name, feeling her not letting go of my hair—everything was visible.
That alone was hot enough. Honestly, I got hard again.
After a long while. Chaeyoung went limp. Breathing uneven.
“………….”
Eyes closed. Sweat beaded on her forehead. Slowly released my hair she had been holding.
“……Different.”
After a long pause, Chaeyoung spoke.
“What’s different?”
“Compared to when doing it with the dick…… this side is different.”
“How is it different?”
“With the dick it comes rushing in…… but this one spreads slowly. Like sinking into water.”
A human’s comparative review having experienced both male and female pleasure. Perhaps humanity’s first review.
“Which one do you like better?”
Chaeyoung opened her eyes. Looked up at me.
Then, after seeming to think for a moment, she said.
“……Both.”
Honest answer. I laughed.
I handed her tissues. Chaeyoung took them and wiped below. Doing it in front of me had become natural.
“……Oppa.”
“Yeah.”
“Next time do both at the same time.”
“When the dick recovers.”
“When?”
“Tomorrow.”
Lee Chaeyoung made a dissatisfied face. Seemed like tomorrow felt so far away.
I checked the clock. 4:30 p.m. About three hours left until mom gets home.
“Clean up your room before mom comes. It was a mess this morning.”
“……Ah.”
Chaeyoung’s face went pale. The blanket and sheets. Traces of the past two days would be clearly there.
“You need to do laundry too.”
“Do you know how to use the washing machine?”
“……I don’t.”
Top of the class can’t operate a washing machine. This is an area unrelated to grades.
“I’ll do it for you. But put some clothes on and come out.”
Chaeyoung picked up her clothes scattered on my room floor and put them on.
Pulled the t-shirt over her head, pulled up the shorts.
Somehow, her putting clothes on looked more regrettable than taking them off—maybe just my imagination.
“……Oppa.”
At the door, Chaeyoung turned around.
“What.”
“Today…… thank you.”
This morning she cried and said sorry. Now she smiles and says thank you.
“Well. It’s my dick after all.”
Same answer. But somehow the meaning seemed a little different.
Chaeyoung went out into the hallway. Sound of footsteps entering her room. Sound of door closing.
There was no sound of the door locking.