My Sister's First Kiss Belongs to Me
"It's been a while, Arwen."
Cordelia greeted me, brushing back her flowing blonde hair. Perhaps conscious of the ears around us, she didn't use that chilly voice she always put on when she visited my room every morning back at the mansion. She still wouldn't call me brother, though.
Come to think of it, ever since I possessed this body, the only person who had called me Oppa was Melina, who was probably holed up somewhere in the mansion right now. And here I had two younger sisters.
"...It's been a while, Cordelia."
When I replied in a voice that sounded half-hearted even to my own ears, Cordelia's lips twitched. She probably hadn't expected a grand welcome, but it seemed my reaction still displeased her.
"Hmm, my visit doesn't seem welcome. And here someone came all the way from afar just to cheer on her family."
Cordelia had read my discomfort with pinpoint accuracy. Wearing an unreadable smile, she stepped closer and brought her crimson-painted lips right next to my ear. A faint, unidentifiable floral scent rose from her neck.
Cordelia whispered softly.
"Or did you think Mother sent me to interrogate you about your little secret with Aunt Masha?"
"..."
When I offered no reply, Cordelia slid her hand slowly across my shoulder. Like a cat playing with a mouse.
"Don't look so terrified. Mother doesn't know about you and Masha. Not yet, anyway."
With that, Cordelia brushed past me where I stood obediently.
What does she want?
I hadn't reacted to Cordelia's provocation because I was scared of my insolent sister's words. I simply couldn't figure out the intent behind my cold younger sister's behavior. To threaten me by bringing up Masha the moment we met... She couldn't possibly have traveled all the way from the distant North just to watch me squirm.
There had to be a real purpose behind her coming to see me, but not knowing what it was was driving me insane.
Cordelia, who had been swaying her hips as she walked away, glanced back at me standing there in a daze.
"What are you doing over there? Hurry up and show me the way."
She had been saying nothing but incomprehensible things since she arrived.
"Show you the way? Where exactly..."
Did she want a tour of the academy like any other visitor? In that case, maybe I should take her to the dessert café where I went with Emilia... No. Why should I bother catering to her mood?
As my words trailed off, unsure how to respond, Cordelia answered with a frown.
"Where else? To your room, Arwen. I have things I want to say to you alone, so hurry up."
She tapped the floor impatiently with her left shoe. The clicking sound couldn't have sounded more arrogant.
Damn it. Did she leave her manners back at the mansion?
Grumbling inwardly at my younger sister, who spoke as rudely as ever—like a stubborn blue pine—I guided Cordelia to my room as she wished. Since she said she had something to tell me in private, I figured I could listen first and judge later.
A short while later, Cordelia stepped into my room and looked around.
"It's cleaner than I expected. Well, your room back at the mansion was pretty plain too."
Then she plopped down on the bed and said something I never could have anticipated.
"I was worried about how I'd spend the next five days, but this should be fine."
Even though we were family, the outrageous suggestion that a grown man and woman should stay in the same room made my voice rise without thinking.
"You're saying you'll stay in my room for the entire presentation period?"
Cordelia raised her hand as if to calm me down.
"Don't misunderstand. I'm not saying we'll share the room together."
She says she'll stay in my room but not share it with me. What kind of nonsense was that?
Cordelia resolved my confusion with a clear voice.
"You can just sleep somewhere else, Arwen. Like in a classroom or whatever."
"What? A c-classroom?"
I had been willing to listen because she said she had something to say, but I couldn't let her keep running her mouth like this. Masha had told me Cordelia wanted to restore the relationship between me and Isabel to the harmonious days of the past, but looking at what this girl was saying now, she didn't seem interested in fixing things between us, let alone between me and Isabel.
I stared at Cordelia steadily and said,
"If you're going to talk nonsense, just go back."
At my icy tone echoing through the room, Cordelia stammered.
"W-what? What did you just..."
I spoke clearly once more to Cordelia, who was staring at me with wide, stunned eyes.
"Didn't you hear me? I said go back to the mansion, you insolent little sister."
Cordelia's body, which had been sitting with her legs crossed arrogantly, froze solid. It seemed she hadn't expected me to push back this hard.
After a moment of silence, she shot up from her seat.
"D-do you think you can treat me like this? If I go back to the mansion and tell Mother about your relationship with Aunt Masha..."
Cordelia was playing the only card she held. But the confidence she'd shown earlier was gone. The slight tremble in her slender arms gave it away.
"Tell her if you want. Go ahead and tell her I had sex with Masha, and with Raibel too. Everything. But..."
I trailed off and took a step toward Cordelia. The closer I got, the more violently her pupils shook.
There were barely two steps left between us.
"You're not exactly innocent yourself, Cordelia. Did you really think I wouldn't notice?"
"W-what do you think you know?"
Whether she truly didn't know or was only pretending, Cordelia kept denying it. Her snow-white thighs trembled as if they might give out at any moment. That told me she was definitely pretending.
If she didn't want to say it herself, I'd say it for her.
"I'm talking about how you masturbated while watching me have sex with Masha that day."
"T-that was..."
Struck right where it hurt, Cordelia lowered her head. She had leaked so much love juice it looked like she'd spilled water—had she really hoped I wouldn't notice?
I kept pressing the flustered Cordelia.
"You're a younger sister who got off watching her own brother have sex, so how about you drop the act of pretending to be pure all by yourself."
"Hic... At that time I just couldn't help..."
"Couldn't help it? Don't give me that. Don't tell me you've been masturbating ever since while thinking about me?"
"Ah..."
Cordelia opened her mouth but couldn't answer. In an instant, even the faint trembling on her skin vanished. It seemed my casual remark had hit the bullseye.
"Ha, your reaction says it's true. So the reason you came to the academy is because you want me to hold you?"
"N-no! That's not why I..."
"Then why? Tell me. I'll listen."
Under my fierce questioning, Cordelia showed me a tearful face for the first time. But I couldn't soften now.
"A-Arwen, I want to be with you again..."
"Again what?"
"Like we used to be..."
Whatever was so embarrassing, I turned away from the hesitant Cordelia.
"If you don't want to say it, fine. Use the room if you want. But don't come near me ever again."
"I'm sorry, so please don't go, Oppa!"
At my declaration that was practically a severance, Cordelia called me Oppa for the first time and rushed toward me.
"W-wait, whoa?"
I had expected her to grab me, but I didn't think she'd charge like an angry goat, so our entangled bodies ended up tumbling down. Before I could even fully savor the joy of finally being called Oppa by Cordelia.
Fortunately, I fell onto the bed beside us, and Cordelia landed right on top of me. Her breasts pressed softly against my chest as she ended up in my arms. Thanks to that, I could hear her pounding heartbeat as clearly as if I were using a stethoscope.
But her chest wasn't the issue right now.
What is this... why is it so wet?
The private place of my stepsister that I had unintentionally touched while falling was soaked as if someone had been caressing it. It clearly wasn't sweat from heat or tension. What had drenched Cordelia's panties was love juice, stickier than ordinary fluid.
"Cordelia, don't tell me you..."
"N-no. This is, um..."
Cordelia, staring at the love juice on my fingers, shook her head with a face flushed bright red. She didn't even seem to think about escaping the embarrassing position of being held like a lover by her brother, staying obediently in my arms.
I could feel the body temperature of the Cordelia in my embrace growing warmer and warmer.
Then a thought crossed my mind. What if all her grumbling until now hadn't been because she hated me, but because she was too embarrassed to speak honestly...
I wrapped my arms around Cordelia's back and slowly pulled her into a hug.
"...If you have something to say, don't hesitate any longer. Tell me now, Cordelia."
Only then did Cordelia confess her true feelings in a tearful voice.
"I... I wanted to become a family with you again like we used to be... Hic..."
The ice-cold demeanor she had shown at the mansion was gone from the Cordelia sobbing in my arms. All I could see was a shy, adorable younger sister who wanted to close the distance with her brother but lacked the courage to approach. That pitiful sight was more than enough to ignite the desire in my heart.
I wanted to make the Cordelia in my arms mine right this moment. As my woman, as my family, as mine alone.
Looking straight into Cordelia's eyes, from which two streams of tears flowed, I said,
"I'm sorry for speaking so harshly. But you don't need to worry about such pointless things."
"R-really?"
Hope discovered within the despair in Cordelia's eyes. I nodded at her.
"Yes. No matter what happens, the fact that we're family won't change."
The moment those words left my mouth, I pressed my lips to Cordelia's slightly parted ones. Thanks to the tears that had flowed from her eyes, it tasted faintly salty.
"Mmph?"
At the sudden kiss, Cordelia's eyes widened into circles. She pushed against my shoulders and turned her head away.
"Pwah... W-what are you doing? You and I are..."
I cut off Cordelia's words.
"Family. You can just think of it as a normal expression of affection between family members."
"Don't joke around. What family in the world expresses affection like this..."
"You think there isn't any? There's one right here."
I gently caught Cordelia's turned chin between my index finger and thumb, making her face me again.
"Don't avoid it this time, Cordelia. It's your Oppa's request."
"Even if it's a request, what can't be done can't be—mmph?"
Once again, Cordelia's lips were sealed by her brother's kiss. This time I tasted her mouth longer and more intensely than before. Her lips, which had been tightly closed as if to block my invading tongue, gradually parted. Eventually, even the tongue that had been fleeing intertwined shyly with mine.
The two tongues entwining inside and outside our mouths created obscene sounds that siblings should never make. The mingled warm saliva of brother and sister flowed down my neck, but I didn't feel the slightest revulsion.
Savoring my younger sister's warm mouth, I slowly stroked her back. Even when my lewd hand traveled from her back down to her pelvis, Cordelia only flinched and didn't push me away like before. Instead, with her eyes tightly shut, she wrapped her arms firmly around my neck.
We hadn't reached insertion yet, but our position was already that of lovers sharing their passion.
I couldn't remember whether I'd locked the door when we entered. If someone suddenly burst in, it wouldn't end as a simple scandal. The entire academy would be buzzing with the story of the forbidden love between the Reinhardt siblings.
Even so, we couldn't stop this act that gifted us pleasure drenched in immorality with nothing but the meeting of our lips.
"Mmmph, mmph! Haah, haah..."
After the long sibling kiss ended, Cordelia panted heavily. From her slightly swollen lips flowed saliva—whether mine or hers, I couldn't tell.
I asked Cordelia, who was looking down at me with a dazed expression, her tongue slightly protruding.
"Can we continue with the next part too?"
I hadn't said it explicitly, but Cordelia would have understood the meaning. That if she permitted it, we would cross the line family must never cross.
"...Taking your younger sister's first kiss wasn't enough, so now you want to take her first time too?"
Her words sounded like scolding the brother who had stolen his sister's first kiss, but Cordelia's expression didn't look angry at all.
"I'm sorry for being a bad brother... but is that okay?"
After hesitating for a moment and brushing her hair back, Cordelia answered with a shy smile.
"...Yes. Because I'm a bad sister too."
Cordelia slowly raised her waist. Then, sitting atop me, she began to remove her clothes one by one. First the cumbersome dress, then the undergarment binding her breasts. Finally, she lifted her hips slightly and peeled off even her panties, which were already soaked and clinging tightly to her pussy.
Now, only a pair of beige stockings remained on Cordelia's white skin. Her breasts with their small pink nipples. And the golden pubic hair—exactly the same shade as the hair on her head—glistening with droplets of love juice. All of it filled my vision at once.
Cordelia, who had finished preparing to cross the line with her brother, scratched lightly at my chest with her index finger in a seductive gesture and said,
"Make me feel good as your woman, Oppa. Please, Oppa."