The Original Protagonist, His First Heroine, My Sister, and I
Seo Moon-hyun, the heir to the Seo family—one of the most prestigious martial clans in Korea—could be said to have lived a blessed life. He possessed striking looks and exceptional talent, and as the designated successor, he had grown up without any shortcomings under the family's high expectations.
'This should do it for today.'
Having finished his quota of monster hunts inside one of the lowest-grade dungeons owned exclusively by the Seo family, Seo Moon-hyun stepped out with the family's warrior who had accompanied him as both escort and assistant. At eighteen, clearing a dungeon of this level was trivial for him. The real chore was collecting the mana stones afterward. That was why the warrior he brought along handled the gathering.
"Thank you for your hard work, Young Master."
"You worked hard collecting them too, sir."
As the heir, Seo Moon-hyun never forgot to speak politely to his subordinates and treated them with kindness. Thanks to that, he enjoyed deep respect from the household staff and maintained a favorable reputation in society.
"Hyun-ah~"
A girl approached, calling his name in a bright voice. She was the same age as him—eighteen—with long beige hair and soft light-brown eyes, giving her a pure and gentle impression. Her most notable feature was her figure; she perfectly embodied the "innocent yet glamorous" type.
"Se-na."
Seo Moon-hyun smiled softly at the sight of her. Lee Se-na. A talented healer and his childhood friend.
"Hyun-ah, are you hurt anywhere? If you're in pain, tell me. I'll heal you."
"Haha~ You're such a worrywart, Se-na. There's no way I'd get injured in a place like this."
Seo Moon-hyun spoke as if it were the most obvious thing in the world. Raised as the Seo heir, nourished by rare elixirs and meticulously guided by his father, Seo Moon-kang-hyuk, his skills far surpassed those of his peers. His blue eyes gazed at Lee Se-na with a gentle light.
'Still, it's nice.'
The fact that she worried about him felt genuinely pleasant. Having a pretty childhood friend concerned for his well-being was a good feeling.
"You never know. Dungeons can be unpredictable."
Lee Se-na moved closer to his side as she spoke.
"We have class tomorrow too."
Neither she nor Seo Moon-hyun attended ordinary schools, but mandatory education still applied to mana awakeners. The academy for mana awakeners only began at age twenty-one, so they had to complete their required studies beforehand.
"Class, huh. So tomorrow's already Monday."
Though reluctant, Seo Moon-hyun always attended diligently, believing the heir of the proud Seo family must set a good example. He completed every assignment and spent weekends and weekday afternoons hunting monsters in dungeons to hone his skills and combat sense. He never forgot to be a model student.
"Hehe~ I knew you didn't like class, Hyun."
Seo Moon-hyun answered her playful remark with equal playfulness.
"It's not that I dislike it. How could I hate a class I get to take with you?"
"Ugh! Really~ Hyun-ah, how can you say things like that without getting embarrassed?"
"Why would I be embarrassed? It's the truth."
He noticed Lee Se-na's cheeks flush slightly but chose not to comment.
"More importantly, all that dungeon work made me hungry. Se-na, want to grab something to eat together?"
"Sure! Ah, Hyun-ah, should we invite Min-hye too? It'd be nice if she came along."
"Min-hye? Alright."
Lee Se-na had always been quite fond of Seo Moon-min-hye. Seo Moon-hyun himself found his younger sister adorable, but Lee Se-na seemed especially attached to her.
'Min-hye used to be so affectionate when she was little.'
While waiting for the call to connect after dialing Seo Moon-min-hye's name, Seo Moon-hyun thought about his sister. The bright, playful girl who used to shower everyone with aegyo had grown strangely mature in front of both him and their father as she got older. She had stopped calling their father "Dad" and now addressed him as "Father," maintaining a respectful distance from everyone in the family while working hard to avoid being looked down upon. Though it secretly saddened him, their father, Seo Moon-kang-hyuk, seemed to approve of this new side of her.
'At least she still gets along well when they do spend time together. That's a relief.'
Just as he thought that, the call went unanswered and the signal cut off. It seemed she had simply hung up on her end.
A single message arrived shortly after.
* * *
'They're getting along nicely.'
From the rooftop of a nearby building, I coldly observed Seo Moon-hyun and Lee Se-na through mana-enhanced vision. The original protagonist and the original first heroine. Lee Se-na was Seo Moon-hyun's childhood friend, someone he had known well even before entering the academy. Their current interaction clearly showed the closeness of old friends.
'Lee Se-na… I wonder what kind of reaction you'll have.'
I was Seo Moon-jin—Seo Moon-hyun's older brother, the one who had been cast out at the age of five with nothing but the clothes on my back. How would Lee Se-na feel once she learned of Seo Moon-hyun's hypocritical nature—knowing of his brother's existence yet treating him like nothing more than a servant?
'Of course, I won't be handing you over to him either.'
Lee Se-na was already part of my plan to claim as my own woman. If I set my sights on her, she would inevitably become mine. But the process mattered just as much as the result. Stealing the original first heroine from the original protagonist had to serve as my revenge against Seo Moon-hyun.
"Oppa, I cut off the call from the younger brother."
A girl with long flowing blue hair and blue eyes, her slender figure swaying in the rooftop breeze, smiled as she spoke to me. Seo Moon-min-hye, now seventeen, had grown into a beautiful young woman radiating seductive charm, her teardrop mole beneath one eye enhancing that allure. Unlike in the original story where she had been affectionate toward Seo Moon-hyun, she now maintained a mature, distant image toward him and the rest of the Seo family. All the aegyo and playfulness she once showed Seo Moon-hyun was now directed solely at me.
"Good. Well done, Min-hye."
When I patted her head, Seo Moon-min-hye grinned happily and nuzzled her face against my chest like a puppy.
"What are you doing?"
"Showing aegyo. Wouldn't you feel good if your pretty, cute little sister acted spoiled like this?"
I smiled at her playful words.
"Yeah, you're really cute. Heh~ How can our Min-hye be this adorable and lovable?"
"Hehe~ Oppa, then will you buy me dinner? I'm hungry."
"Hmm, I wonder?"
When I answered teasingly, Seo Moon-min-hye puffed out her cheeks slightly.
"Really~ Oppa, aren't you sorry for your cute little sister who's starving? That's too much~"
She seemed to be sulking, but it was obviously just playful. Seeing her like that brought a warm smile to my face.
"Alright. You look so pitiful, I'll buy you something."
As I spoke, I gave her butt a light pat.
"Kyaa~ Oppa~ That's a grown lady's butt you're touching!"
"Huh? A grown lady? Weren't you just my cute little sister a second ago?"
"Aah~ Really~ Oppa~"
Seo Moon-min-hye let out a startled yelp, but her lips were smiling. Her scream wasn't genuine either—it was another playful attempt to fluster me. But I knew her too well to fall for it.
"Haha, fine. More importantly, let's head to the restaurant at Yucheon Hotel. I'll buy you whatever you want there."
Yucheon Hotel, operated by Yucheon Group, was an ultra-luxurious establishment with top-tier facilities. Though newly built, its restaurants were elegant, and it offered private, isolated dining areas where one didn't have to worry about prying eyes. Its secrecy was so airtight that even some rookie politicians used it when they couldn't find a suitable place for sensitive conversations.
"Waa~ Oppa really is the best! Oppa, I love you!"
I gently embraced Seo Moon-min-hye as she playfully jumped into my arms and thought to myself.
"Yeah, Min-hye. I love you too."
I'll love you for the rest of my life. As my woman, forever.
With that thought, I savored the sweet scent of her body and the soft warmth of her figure pressed against me.
