The Third Prince Of Darkness

**-A Few Weeks Later**

When I woke up, I felt a weight on me. As I rubbed my half-open eyes, I saw a silhouette above me and immediately opened my eyes fully, only to find a girl with long, wavy blonde hair and red eyes sitting on my thighs, looking at me with a wild grin. There was only a quilt between us.

"Who are you?" I asked, still groggy from sleep.

"Don't you recognize me, little brother?" she said, crossing her arms over her chest.

I was surprised by her calling me brother, but when I looked into her red eyes and saw her golden blonde hair, someone came to mind. My brain refused to believe that my sister Kayle, whom I hadn't seen for years, was now this mature and very beautiful girl sitting before me.

"Kayle? Why are you on my lap?" I asked, still trying to wake up. I must have practiced too much fighting last night.

"Huh? Do I need to ask for your permission to use you as a chair?" she asked, swaying on top of me.

Oh no no no!...I hadn't had sex with Avanne for weeks, and with no one else to do it with, I was very horny. So, every morning, I had to spend time calming my erection. And now, with a girl on top of me who could outshine even the actresses from my old world, controlling myself became impossible.

"What's wrong, little brother? Your face is turning red. Are you embarrassed to see your beautiful sister after all these years?" Kayle said, laughing.

Of course, her laughing made her body move more, and eventually, my little dragon started roaring. It's all Avanne's fault! She even banned me from touching her! Actually, it's not her fault at all. The real blame lies with my damn father! Because his genetics were dominant in me, I also inherited his lustful nature!

When I looked at Kayle, I could see her eyebrows furrow, probably feeling the hardness beneath her hips. Damn subconscious. Finding this situation exciting, my penis started to harden even more. Kayle, trying to understand what was going on, moved back and forth on me to figure out what this hardness she felt was.

"Stop..."

"W-what is this, l-little brother?" she asked, starting to blush.

"Well, I guess I'm not so little anymore..." I said, grinning.

Kayle looked at me with a flushed face and jumped off me, pulling my quilt to cover her body as if she wasn't wearing any clothes.

"DON'T LOOK, YOU IDIOT!" she shouted.

"You're not naked, idiot!" I retorted, getting up.

Seeing me stand up, Kayle took a few steps back and covered her face with the quilt. Ah, now I remembered that this girl had a problem communicating with men, and I was probably the only man she was close to. So, what she just experienced might have been somewhat traumatic for her.

"I'm sorry, I couldn't control myself..." I said to Kayle, who I couldn't see because she was covering her face with the quilt.

Kayle pointed at me with a trembling finger and shouted, "You have to take responsibility for this!"

Responsibility? Hasn't this girl learned anything about sex all these years?

"Take responsibility for what? I didn't do anything  you! Besides, we're siblings, even if only half-siblings, you idiot!"

"So what if we're siblings? You still have to take responsibility for what you did!"

Ah, right? In this world, incestuous relationships and even marriages aren't that unusual. That's why some noble families marry their children to each other if they can't find someone as strong as their children, to ensure that the next generations don't weaken and the family's power doesn't diminish. 

After all, Kaizer strength was a genetic trait passed down from parents to children. So if your parents are weak in this world, it is very, very likely that you will be weak too.Incestuous relationships aren't common in the Kingdom of Asina, but they are in the Tamerid Empire and the south.

"Get out of my room. Go talk to your mother and learn a few things about sex!" I said and tried to drag Kayle out by her arm... but what is this?

I couldn't move Kayle at all. In fact, even if I pushed with all my strength, I could barely budge her. This meant that her Kaizer power was higher than mine. After all, increasing Kaiser power not only boosts your magic power but also strengthens your body.

A few seconds later, Kayle freed herself from my grip and ran toward the door. Before leaving, she turned to me and threw the quilt she had been covering her face with at me. Now that I think about it, how did she manage to run straight to the door while her view was blocked by the quilt? No doubt, Kayle had grown quite strong during the years we were apart.

"We'll talk about this later!" she shouted, and I heard her running footsteps as I pulled the quilt off my face.

After a deep sigh, I could only pray that Kayle wouldn't exaggerate the incident when telling she mother Isabella. I got up and walked to the bathroom to start my usual morning routine with a cold shower.

•••

Over an hour later, I finally managed to leave my room. Unfortunately, calming my dragon took longer with Kayle's contribution, but I felt better now. After leaving my room, I initially headed toward my master's place for a lesson, but then changed my mind and walked toward my study. After all, I was on vacation since Fiona's daughter's wedding was a week away.

Ah, right! My sister Violet, who is currently attending the Dragon Academy, should also be back now. I need to talk to her about marriage... Also, my other siblings should have arrived at the palace. The last time I saw them was at the Ceremony of the Water of Fate, but I don't remember their faces at all. After all, I was a newly reincarnated baby back then. So, I would be meeting Fiona's two sons for the first time in eighteen years.

I had heard that her eldest son was quite popular among the nobles. Even I had heard rumors about his virtuous personality and how helpful he was. As for Fiona's second son, I knew he was a muscle head skilled in combat. Also, that muscle head would likely want to formalize his engagement to Roxanne.

I can't leave my beautiful Roxanne at the mercy of someone like him. I definitely won't let him have Roxanne, and I need to come up with a plan to steal her away. I had already told Roxanne that she wouldn't be with that muscle head and even made her a promise.

I already had a few plans, but they were a bit risky. First, I can't kill that muscle head. Not that I can't kill him, but rather I shouldn't. I believe I can beat him in a fight. But if I were foolish enough to kill him, I definitely wouldn't be able to hide the fact that I did. After all, our strengths are roughly equal, and I wouldn't come out of that fight unscathed and would be weakened.

And most likely, his elder brother, the first prince, would seek revenge,  effectively handing him the throne on a silver platter. 

For now, I have a plan to save Roxanne from the second prince, but I hope I can come up with a backup plan...

With these thoughts, I had already reached my study. I opened the door, walked to my desk, and sat down. I opened the notebook in front of me and continued writing from where I had left off. I was currently writing a book. This book was a blend of the philosophy and psychology books I had read in my previous life. Especially ideas resembling those in Plato's books, which I wrote as best as I could remember.

I planned to publish this book and future books not under a false identity, but under my princely identity. The reason for this was, of course, to increase my prestige, especially among the nobles. Later, I would give these books to the printing company founded by my false identity, Arthur, to have them copied and spread across the continent.

After all, it was a nice and useful hobby to ensure my free time didn't go to waste. So, I continued writing and began composing the dialogues of my fictional character, Socrates. Of course, it would be somewhat different from the original work, since I couldn't remember the entire book, but at least it would be a quality philosophy book. When I wrote the other books, I would certainly be respected on the continent. I would be very famous, especially among the elite.

"Knock~Knock~Knock!"

When I heard the knocking, I raised my head and looked at the door. "Come in!" I said, raising my voice.

A very beautiful woman with white hair and blue eyes came in. She had a smile on her face as she looked at me and slowly walked in.