I Was Reincarnated in a BL World, but as the Villainous Younger Brother of the Protagonist, So Please Leave Me Alone - CHAPTER 1

CHAPTER ONE

Act 1 scene 1

Reincarnation is  a concept every otaku is bound to come across at least once in their life. Of course, I am no exception. Yet, what I had envisioned was a classic tale where I am surrounded by charming girls, wielding magic and swords to vanquish evil! If reincarnation were a reality, I would have asked for such an ideal scenario.

By the way, I have a younger sister who is a fujoshi. Despite being in her first year of high school, she secretly indulges in intense BL games. She once showed me one of these games.

“This protagonist’s younger brother is incredibly talented but deeply jealous of his handsome older brother, causing all sorts of trouble! The story revolves around characters trying to resolve the issues between the siblings, and it’s actually quite engaging! You should give it a try too, big bro!”

She insisted on showing it to me. However, as a high school senior with looming university entrance exams, I politely declined.

Now, why am I suddenly talking about reincarnation? Do you understand?

It’s because…

“Look, Yuito. This is your new older brother, Terushi. His name is Terushi… Try to get along.”

In my previous life, I succumbed to heatstroke while heading to an exam on a deserted path, which led to my untimely death. In this life, despite being raised in a single-parent household, I’ve strived to find happiness by actively engaging in household chores.

One summer, when I was in the second grade of elementary school, I was taken by my father to a certain house. There, I was introduced to a fourth-grade student who turned out to be…

“Yuito-kun… Nice to meet you. I’m Terushi. Please take care of me.”

That smiling face… unmistakably, the protagonist of the BL game I had been shown just a few days prior—Nanami Terushi!

In other words, my role is… the villainous younger brother who torments his older brother and leaves him with numerous traumas—Nanami Yuito…!?

What a predicament! Here I was, hoping to find happiness…

Since the introduction, overwhelmed by the shock of discovering my role as a villain and the BL game, I seem to have fainted…

No, I refuse to be a villain!!

ーーーーーーーーーーーーー

Act 1 scene 2

Welcome to my new world—my room, to be precise. The ceiling is rather ordinary, the bed a modest single. A calendar hangs on the wall, a study desk sits nearby, and there’s a bookshelf filled with knowledge yet to be explored. For a second-grader, it’s quite the remarkable little haven.

Yet, here I am, Yuito Nanami, who seems to have spent an eternity unconscious. Outside, the sky has already surrendered to the twilight, though the night has not yet fully claimed the world. A glance at the clock on the desk confirms it—just past 6 PM.

“…So, I’ve really been reincarnated, haven’t I?”

A sharp pinch on the back of my hand brings a sting of pain, dispelling any lingering doubts that this might be a dream. Yes, I recall it now: the heatstroke on the way to my exam. How absurd to suffer heatstroke in exam season, but the sensation was unmistakable. I’ve flirted with heatstroke before, back when I forgot to hydrate during practice, so I know what it feels like.

Why now? Why this time of year? The questions swirl, but they change nothing.

What really matters now is what comes next. From what I remember, I—the younger brother—torment my elder brother in all manner of ways. Hiding his shoes is just the beginning. I exploit our parents’ absence to cut the power while he’s in the bath, unleash hordes of insects into his room, and even go so far as to orchestrate an attack on him by a stranger… I recall reading these horrific acts in the game’s description.

I could never do such things. But then there’s that nagging phrase, “narrative correction.” No matter how good my intentions, the story may twist them into malicious deeds. In reincarnation tales, it’s a familiar trope. I have no desire to torment the protagonist or commit any actions that might land me in an institution.

But how will this world react? I don’t know.

What if, no matter what I do, every misfortune is blamed on me?

The thought sends a shiver down my spine.

Yet, I can’t stay buried under these covers forever. As I slowly rise from the bed, preparing to face whatever comes next—

Knock, knock.

“Um, Yuito… are you awake? Are you okay?”

The door creaks open, and there stands Akito, his voice gentle, his concern palpable.

“Yuito, you collapsed so suddenly. Are you alright?”

Ah, what a remarkable child. Only in the fourth grade, and yet so composed. When I was his age in my previous life, I did nothing but run around and get scolded by Mum.

“Y-yeah, I’m fine now. Sorry for worrying you.”

“No, it’s okay. I’m just glad you’re alright. Mum and Dad are downstairs—can you come with me?”

I nod, and Akito smiles, taking my hand to lead me downstairs. Despite the shock of being suddenly introduced as his brother, he handles it with grace. As we descend, a strange feeling stirs in my chest.

What is this? I don’t need to wonder—it’s the original story’s “brotherly jealousy.” My mind may be that of a high school senior, but this jealousy… I can feel it.

“Yuito, are you sure you’re okay?”

I’ve stopped in my tracks, and Akito looks up at me, concerned. I quickly nod, managing a small smile as we continue.

I have to live with this jealousy, control it somehow… or I’ll end up in an institution.

The thought of succumbing to this jealousy terrifies me. I grip Akito’s hand a little tighter, and he squeezes back. The gesture isn’t unpleasant.

I exhale softly, watching Akito’s back as he leads the way. “I’ll do my best…” I mouth silently.

“Oh, Yuito! Are you alright?”

“Yuito, you’re not feeling sick anymore, are you?”

Dad and my new Mum welcome me with warm smiles. I quietly assure them I’m fine, and they gently pat my head, guiding me to a chair. As I sip the juice they offer, Dad’s serious tone catches my attention.

“Yuito, there’s a reason why we hurried with the remarriage.”

For the first time, Dad explains the circumstances behind the marriage, speaking slowly, ensuring even us primary schoolers can understand. In essence, this is what happened:

Dad and Mum work together. While Dad was away on an extended business trip abroad, it was planned that I would stay with Mum. However, Mum was also suddenly assigned overseas. I had already once declared, “I don’t want to go abroad!” So, they were hesitant to force me to go, finding the idea both unpleasant and frightening. Hence, they decided to remarry and have us two children stay in Japan.

That’s how it came to be. But nothing about this is okay! We’re still in primary school! Sure, I’m a high schooler on the inside, but still a primary schooler on the outside!

However, Dad continues, saying that if I change my mind and decide it’s alright to go abroad, they will take me along. I glance at Akito, who looks understandably anxious. He’s only in the fourth grade—of course, he’s worried. And to think, he’ll have to take care of me, too. Maybe the best course is to let Akito decide, and I’ll follow his lead.

“…I’ll stay in Japan.”

That makes sense. It’s too early to be separated from parents… huh?

“Alright, Akito. You’ll stay in Japan, then.”

“Yuito, are you okay with that?”

“Huh? Y-yeah…”

I half-expected the story to twist, sending Akito and me abroad, but it seems that won’t happen. I remember my sister once told me, “The protagonist is incredibly protective of his younger brother. Since their parents weren’t around much when they were younger, he feels he must take care of him!”

I see… because their parents are away on business trips, Akito feels it’s up to him to manage everything.

“The overseas trip is in a week. Of course, I plan to teach you everything you need to know before then, especially things like using bank accounts, cards… all that banking stuff,” Dad explains seriously.

“Yeah, I’ll learn it.”

“I’m sorry we can’t be here for you all the time…”

“It’s okay. I’m the big brother now.”

Despite his brave smile, it’s clear that Akito is forcing himself to stay strong. I need to show him I can help too, to ease his burden.

“Hey, I used to cook and do laundry when I lived with Dad, so I can help with the housework too.”

I tug on Akito’s sleeve as I make my suggestion, and he looks at me, surprised.

“That’s right! Yuito’s cooking is really good!”

“You can cook already, even though you’re just in the second grade? That’s amazing… But Akito, make sure you watch him closely, so he doesn’t forget to turn off the stove.”

I’ll help with the garbage, the bathroom cleaning, the room tidying—everything. As I list off my tasks, I see the worry start to fade from Akito’s face. He squeezes my hand again and smiles.

“Thank you. Let’s do our best together.”

He says this with a pure, sincere smile, one that warms my heart.