I heard that His Royal Highness, the crown prince Fredrick, sometimes stood on the battlefield.

The portrait I saw in the castle was of him in the gallant military uniform. Naturally, his cosplay attire was a military uniform. 

The golden button showed its brilliance on the upright corner, the multi-layered aiguillette on the jet black fabric and the blue rose was made up of sapphire. Each time the jet black mantle like the cloth fluttered, the two-headed dragons embroidered with the silver threads swam gracefully.

It looked good.

Although my father was wearing it, the attire was so wonderful I couldn’t help but be fascinated by it.

I was seriously wondering if I should purchase his portrait next time.

Ultimately, my father won the royal family’s special His Highness Fredrick’s attire.

When others’ expressions were indescribable, the Queen took advantage of this situation and suggested some attire options to everyone.

Michela as a vampire, Laurenz as a devil, and so on, which was a sight for sore eyes since they were originally glamorous persons. Still, why was the Crown Prince… wearing cat ears? Moreover, it looked really strange with the hair and the thin inner skin.

I would repeat it; he had cat ears while in his regular formal attire. 

Just as I was petrified, he noticed me and smiled pridefully.

“How is it? It must be amazing, right? I don’t mind if you want to feel them.”

“It’s fine, Your Highness… Absolutely and with discretion, please allow me to refuse from the bottom of my heart.”

It was tough for me to endure the urges to feel the feline characteristics. Although it was only the ears, I desperately tried not to look at them.

I really wondered why he couldn’t stop his typical harassment towards me.

And Luca was dressed in a white cassock. 

I had no idea why it was white. The Queen had really done awfully good work.

Luca’s unworldly beauty was just too well matched with the untouched pure white cassock. If I weren’t in public, I would have been rolling on the ground in agony. I wondered if my excitement was conveyed.

It was so amazing I gave the Queen a thumbs up in my heart, but the person himself was very dissatisfied.

“Father, isn’t it too much? Please change.”

“Isn’t it fine like this? Look, don’t Philia and I look good?”

“It doesn’t seem like that to me, though. I only see a middle-aged perverted man in disguise escorting his young lover.”

 How many times were they going to repeat this exchange?

I truly wanted to see Luca wearing His Highness Fredrick’s attire. The black color already looked good on him. Still, imagining black a military uniform with his beautiful face… Wonderful. 

My heart throbbed just from imagining it.

My mind was filled with Luca’s attire while being escorted by Luca and Father on either of my sides. 

Luca seemed frustrated from missing out on His Highness’ attire and was comparing his and father’s attires. 

His childishness, where he showed himself as if he didn’t care about anything, was oddly cute.

We were awfully popular at the Halloween party sponsored by the royal palace. Many people dressed up like the Kingdom of Wilhelm, the talk of the town, but their perfection was nowhere near the Queen’s special-made dress. 

Like this, Halloween, with me trying my best to hold down my grinning face in many ways, which was really tough to do, was over.

Returning to the Duke’s mansion, I took off my dress as soon as possible.

Although it was a tweaked product, the thing was troublesome.

While Angela was helping me take off the dress, she absentmindedly muttered, “This slimness… is a lady’s ideal,” which bothered me a lot.

I had to be careful about my diet from the next day. When you were fat, your diet would automatically be comprised of healthy meals.

I really felt much better after I changed to nightwear. The tiredness wasn’t only because of the dress but because I ate chocolate made of fruit wine, and the alcohol made me sluggish.

When Angela opened the door to leave, I could hear the trick-or-treaters shouting from inside the mansion.

It must’ve been servants’ children raiding the adults to get treats out of them.

I suddenly recalled my first Halloween with Luca, who had just come to this house. 

“Trick or treat, Luca!”

“Trick… What do you mean?”

“You don’t know?”

When I asked Luca, who blinked in puzzlement, he nodded honestly.

It seemed Luca didn’t know what Halloween was. I felt unspeakable sadness for my little brother, who didn’t know about the children’s favorite event. 

I knew about Luca’s childhood from the game setting, but only then its meaning heavily weighed on me. Maybe there wasn’t even a single happy event in his seven years of life. 

Although he was raised in a situation similar to abandonment, my honest and innocent little brother was somehow adorable.

I tightly hugged Luca and kissed him on his round cheeks.

“Sister?”

“I love you, Luca.”

I smiled at my little brother, whose eyes rolled at my sudden words, and pinched his small nose.

“I will forgive you for this year’s mischiefs. Let’s prepare some sweets together next year.”

“Sure…”

I explained Halloween to him, who didn’t understand what I meant, and the two of us ran around the mansion hand in hand. When I gave him the sweets we got to eat, his almost expressionless face somewhat crumbled, and I also felt sweet happiness as if I had also eaten the sweets.

I hoped that the normal days that had been so uneventful until now would only be filled with happy memories from next year onward. 

It was eleven years ago today that I wished that.

While submerged in the memories, I heard a knocking sound. As I opened the door, a smile unconsciously spilled out.

The young boy who was so puzzled at that time had grown up to the point he could look down at me and uttered the standard line.

“Phi, trick or treat?”

“Treat! Here you go.”

I offered him the tiny chocolate I prepared for him, and he slightly opened his mouth to receive it. When he rolled the chocolate on his tongue, his expression loosened lightly as it did during childhood.

It was oddly nostalgic, and my heart gradually felt warm.

“Now, it’s time for the return gift. Luca, trick or treat?”

“Unfortunate as it may be, I don’t have sweets, Phi.”

“Huh?”

When I subconsciously tilted my head, Luca mimicked me and said.

“They were snatched away by your maid. She said something like the young Lady is in the middle of chocolate prohibition.”

“Angie…”

I could only take off my hat in admiration of her to commence the attack on my waist so quickly. Sometimes having an outstanding ladies’ maid was also a headache.

While depressed, thinking about the coming days with a scarcity of sweets, Luca’s white finger touched my cheeks.

“Sister, since there isn’t any candy… Can I choose a trick?”

My spine trembled from the chill I felt when he breathed out sweetly as if the replacement for the sweet.

His enchanting emerald green eyes wished for something that was not a child’s game. I was greatly flustered when he took a backhanded approach despite how he usually threw a straight ball and proceeded domineeringly.

Moreover, he was in cassock attire. He hadn’t changed his clothes yet.

“W-Wait, Luca.”

“I want to play a mischief on you.”

I really wished he could stop saying that with a straight face. When I was shocked by his words and restlessly looked around, I felt Luca suddenly smile.

I felt as if I was being teased. It was rare for him, but he seemed to enjoy seeing me perplexed.

“Then I will trick you.”

The reason I might have thought that must’ve been because I was seduced by alcohol and Halloween.

He kept staring at me with his pale green flame-like eyes and his back towards the back of the door. When I looked at him like this, I thought he was charming. Each and every strand of his platinum blonde hair was so beautiful as if the gods or something carefully crafted it.

I wondered if it was because he didn’t usually choose white clothes to wear that even his eyes smoldering with lust looked somewhat pure.

That was why I was sure I couldn’t do anything like this when sober. 

I touched his meticulously carved jawline, stood on my tiptoes, and kissed him. I pushed back Luke, whose tongue tried to enter and entwined around mine, saying not yet. An obscene, splashing water-like sound resounded from the playful kiss.

I pushed him back as he deeply tried to devour me, and when my lips slid from his chin to his neck, his throat twitched reflexively.

“Sister… “

“Don’t move.”

Mere sucking on the thin skin around the nape of his neck left a mark on his fair and white skin. I felt his shoulders stiffening as my hands were on his shoulder, and his breathing slightly hitched.

“Does it hurts?”

“It’s fine.”

Luca shook his head while squinting his eyes for a moment.

I ran my fingers on his priest’s garb and noticed that my fingers were slightly trembling. 

Although I couldn’t say that I was a chaste maiden in my heart and body, I wondered if it was because I was nervous… No, maybe I was excited. It was simply that I had a guilty feeling as Luca’s attire gave a strong sense of guilty pleasure, and it was because I was trying to deceive my palpitating heart.

Just as I was in despair at my female molester-like manner, Luca took my hand and kissed my fingertips.

“You’re shivering… so cute, sister.”

I felt like Luca was misunderstanding my reason for trembling. But this time, I felt like it would be nice if he kept misunderstanding me for the rest of his life. 

I definitely didn’t want him to know that my heart was throbbing due to his attire. Be that as it might, it was getting on my nerves that he was enjoying my quivering. I must’ve pulled a prank where he couldn’t say something like I was cute.

I unbuttoned his coat and the shirt, and his skin got exposed before me, revealing the well-trained body worthy of admiration. As I ran my hands over his supple, thinly muscled chest, I felt his abdominal muscle tightening. I couldn’t stop myself from rubbing on his flamboyant stomach covered by ridges of his magnificent muscle.

“Ah… It tickles.”

“Doesn’t it feel good?”

“It’s because… you’re touching me.”

I didn’t know when but touching his taut, supple skin with fingers and lips felt so good I was completely absorbed in it. Each time I kissed and sucked, Luca’s hand moved around my shoulder and hair as if he didn’t know what to do with them, and it felt ticklish.

When my lips grazed against the protrusion on his chest, he shivered from surprise and hugged me suddenly.

He pushed me against his bare chest, and I felt suffocated as my mouth and nose were tightly buried in his chest. Luca let out a feverish sigh as I felt pain from my nose being crushed, tears almost spilling out due to pain.

“It’s over.”

“Already?”

I subconsciously asked him back in frustration. I hadn’t yet done anything except touch him.

When I looked up at him, he was also looking in reproach.

“I thought you were bothered, but it doesn’t look like it at all.”

It seemed he was teasing me after all. However, it was too late for regrets. 

I couldn’t say I was highly experienced, even including my previous life, but I had been through the whole thing. I had no hesitation in expressing my desire like I wanted my beloved person to touch me honestly.

When I touched his spot, which was obviously reacting, his beautiful face contorted.

“That’s not good, sister.”

“But didn’t you say you wanted me to play a prank on you?”

“But this is…”

When he tightly shut his eyes and moaned, his face was terrifically heart wringing. I had never seen Luca’s upset face like this before because I usually lost myself in the flow. 

“Ahh… sister…”

The sigh spilled out from his lips was just too sexy for it to be a man’s. My heart fluttered from seeing his stiff white skin slightly dyed in crimson. His breathing stimulated my womanly part to a hopeless degree.

I tried to loosen the front, but he grabbed my hand as if he panicked. Luca didn’t know when to give up.

“P-Please stop… I don’t want you to do this.”

“You know, Luca, it’s the same for me too. I also want to touch my beloved person.”

“You and I are different.”

“It’s not different… Will you not listen to your elder sister’s request?”

I would do it today, no matter what he said.

We had been siblings for eleven years.

When I glared at Luca with whatever paltry amount of elder sister dignity left in me, Luca turned to look in another direction while pressing down his mouth. 

“It’s foul play…”

I didn’t understand what had happened, but I opened the front anyway. I couldn’t help but stare at the hard erected bulge source.

I had been thinking about this since our first time, but no matter how many times I saw it… It was really hard to believe this size could fit inside me.

Luca looked as if he couldn’t believe what was happening when my fingers crawled inside his underwear and gently covered the stem with my hand. 

Looking at his moist eyes, I couldn’t help but leak a tiny smile.

“S-Sister…”

“I don’t want to hear anymore… Just relax. It will not hurt.”

I kneeled as I spat out the line like a seducer. When I dropped a kiss on his already upturned tip, it was slightly wet.

“Bitter….”

“That’s why I’m saying… Aaah…”

I put the tip in my mouth carefully not to let my teeth touch it, and Luca bent his body and moaned. Since I couldn’t put everything in my mouth, I just rubbed the stem, kissed the tip, and licked, but my breathing became rougher, and my abdominal muscles spasmed violently.

Luca’s finger crawled on my fingers as if clinging to them, impatiently shuffling.

He looked as if enduring something. His frowning expression was subliminally erotic, seeming somewhat heart-rending.

I didn’t know if the face of your beloved person when they were feeling it could shake your heart or body so much.

I wanted to do it more, and my mouth opened naturally and took the stem to the deepest part of my throat. When I tried to run my fingers up to the stem’s base, my head was suddenly grabbed. 

He pushed it inside my mouth mercilessly in one breath and what I was holding in my mouth came out.

“Sister… where did you learn about things like this?”

When the terrifyingly gloomy voice called out to me, I came to my senses.

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