I dove into the “Make Kim Yiseon Healthy” plan, moving with strict discipline since kindergarten.

But there’s one blind spot.

“Status window! Stats! Inventory! Character screen! Shop! Gacha! Stream!”

Kim Yiseon’s injury might be due to poor management.

If I manage it perfectly, maybe I can have a long career without injuries.

But what if the problem is Kim Yiseon’s body itself?

What if, despite all the management, it’s just prone to breaking?

“Quest log! Mission screen! System! Affinity chart! Faction menu! Scenario!”

The author didn’t exactly deny the “glass body” comment, did he?

After racking my brain for solutions, I realized the only answer is a reincarnation perk.

“Skill window! World map! Item check! Uh… what else was there?”

But Yashin, that jerk, seems to lack genre savvy.

Normally, when you’re reborn in another world, you get some overpowered perk, right?

Is there really nothing?

“Hey, Kim Yiseon, what are you doing? What weird stuff are you up to now?”

“Go away, I’m thinking about the most critical part of my life plan.”

“Life plan? You? Stop talking nonsense and come on. My mom says we’re eating out with your family tonight.”

“What’s the menu?”

“Grilled eel. Why do you avoid so much food? Picky eating stunts your growth, you know.”

“It’s not picky eating, it’s diet management. I want to eat whatever too.”

The girl giving me a pitiful look sighs deeply and gestures to hurry up.

I can’t resist eel.

I trudged home with Lee Yeeun.

*

The girl who was just nagging is Lee Yeeun.

We’re not that close—just our moms are friends, and we live in the same apartment complex, nothing special.

But as you can guess from her reddish-brown hair, she’s a character from the original manga.

One of the criticisms of Weakest Ace was that, despite being a sports manga, the story only shows game highlights and results, with no focus on training or preparation.

They complained that the kids’ daily lives and romance eat up the whole story.

If you’re a manga nerd, you’d know that’s unfair.

High school baseball manga are just like that.

Training gets a couple of panels, and new techniques are mastered in one chapter—that’s standard for baseball manga, right?

Who wants to see every grueling training detail? That’s just boring filler.

Anyway, Lee Yeeun was at the center of that criticism.

Not even part of the main romance, her side couple caused a huge uproar.

Her love interest? Obviously Kim Yiseon.

In the manga, they go through kindergarten, elementary, middle, and high school together, just like now.

To create a strong contrast with the protagonist, the protagonist’s baseball team manager is a childhood friend with a gentle, housewife vibe.

Meanwhile, the rival Donghyeon High’s manager, also a childhood friend who likes Kim Yiseon, is the outgoing, gal-type Lee Yeeun.

Early in the manga, she appears lightly, looking down on the protagonist and his team.

Later, her love story becomes a major arc in the second half.

Half the fans raged about the side couple being forced filler, while the other half said Lee Yeeun’s cute and should be a heroine via NTR, making the fandom a total mess.

“Hey, do you like me?”

“What are you on about? You’ve got food on your face. Eat without making a mess, you absolute moron.”

I wondered if she liked me like in the original, but maybe because I’m not the original Kim Yiseon, it doesn’t feel like a crush.

It’s more like she’s looking after a clueless little brother.

Stuffing greasy eel in my mouth, I whispered to Lee Yeeun’s younger brother.

“Hey, why’s your sister so grumpy today? Did something happen?”

“Dunno. She’s not like this at home. Seems worse around you, hyung. Shouldn’t you know why?”

“No idea…”

She’s never been a tame beast, but lately, she’s like a starving predator right before hibernation.

Did someone invade her territory or something?

Dodging Lee Yeeun’s intense glare, I continued a deep discussion about the cause with Lee Hayul (age 6, note: listed on the same family registry as Lee Yeeun).

I genuinely can’t guess the reason.

*

After starting elementary school, I kept up the yoga-running-bodyweight exercise routine without fail.

I was lounging at home, resting, when my mom glanced at me and asked,

“Son? Didn’t you have gym class today? Your gym clothes aren’t in your bag.”

Gym clothes?

I remember changing after gym class, but did I grab them?

My memory’s fuzzy…

“Did you lose them?”

“No, I probably left them at school. I’ll go get them.”

After losing my indoor shoes last time and my entire bag the time before, saying I lost something again pricked my conscience.

If they’re not in my bag, they’re probably in the classroom.

The school’s open late anyway, so a quick trip should be fine.

Dragging my tired body, I shuffled to school.

Near our classroom, I heard hiccuping sobs.

“Hey, what are you doing here?”

“Mind your own business, moron.”

There was Lee Yeeun, sitting at a desk, tears streaming down her face.

She was practically bawling but stifling her sobs, covering her mouth.

Was it pitiful or just intense?

Ignoring her attempts to hide it, I grabbed a sheet from the stack of papers on her desk.

“I will not use violence against friends.”

“I will resolve issues according to the rules.”

“I will use polite and kind words.”

…This is a punishment worksheet, isn’t it?

“Hey, Lee Yeeun, who’d you hit?”

Her temper’s rough, but she’s not the type to hit someone… Wait, why’s she suddenly sobbing harder?

She was holding it in just fine a second ago!

“Hey, hey! Don’t cry! Who was it? Who messed with Lee Yeeun?”

“Hic, sob…! You f*cking moron! It’s because of you, hic, sob…!”

“Alright, my bad, my bad. Just calm down for a sec, okay?”

“Goddamn moron… I swear…”

After calming her down and coaxing out bits of the story she didn’t want to share, here’s what happened:

Lee Yeeun didn’t like this girl, let’s call her A.

Today, A was acting suspicious, and when Yeeun confronted her, she found A had stolen my gym clothes.

I don’t know why A, who’s a different size and gender, would take my gym clothes or what she planned to do with them.

Anyway, Yeeun got pissed, yelled at A, got physical, and got caught by a teacher patrolling after school.

Now she’s stuck with a mountain of punishment worksheets.

Guess it is my fault.

No wonder she got upset when I asked who she hit.

Feeling a bit guilty, I glanced at the stack of worksheets.

The pile’s so tall you could measure it with a ruler.

What kind of teacher assigns this much?

Even if she messed up, this is excessive.

With no choice, I pulled a chair to Yeeun’s desk, sat across from her, and quietly picked up a pen.

“…Get lost. I’ll do it myself.”

“Yeah, yeah, sure.”

Ignoring Yeeun’s prideful insistence, I started writing.

Wow, the line spacing is tiny—practically 9-point font in Word.

This isn’t discipline; it’s like the teacher’s a sadist who enjoys watching kids suffer.

Struggling with the small spaces, my fingers got tired fast.

I’d already used up my grip strength from training, and the tiny font didn’t help.

After a few sheets, I couldn’t write anymore.

I’d just acted tough in front of Yeeun, so stopping to complain about hand pain felt lame.

Gritting my teeth, I kept going, but soon my hand started trembling from more than just fatigue.

The sun’s already setting outside.

If I want to get home before dinner like Mom said, dawdling won’t cut it.

My handwriting’s a mess anyway, so I switched the pen to my right hand.

They say lefties often use their right hand too, but my family never corrected my left-handedness, and with plenty of lefty-friendly stuff these days, I’ve barely used my right.

Focusing with my off-hand, I started writing.

As expected, my weaker hand produced barely legible scribbles, and it felt so awkward.

“Huh?”

Wait… why’s this working?

The first few words were wobbly, but my writing steadied, and by the end of a page, it was nearly as good as my left hand.

It started off clumsy, but it’s like a familiar sensation kicked in, and I adapted fast.

Could I push this further?

I grabbed another pen, holding one in each hand, and wrote the same thing simultaneously.

It took focus, but the words came out almost identical on both sheets.

“Hey, Lee Yeeun.”

“…What?”

“I’m giving you one free pass. As long as it’s not a crime, I’ll forgive anything.”

“What nonsense are you spouting now?”

I was buzzing with the thrill of discovery, but Yeeun looked at me like I’d lost it.

Oh, she doesn’t get it?

“Look at this! Ambidexterity!”

I’m already so used to it that both hands move at nearly the same speed as one, filling out the worksheets.

Yeeun blinks, then lets out a big sigh.

“This moron thinks he’s hot stuff…”

Does she not see how awesome this is? Typical normie.

This is my [isekai reincarnation perk].

It’s not a status window, but it’s a cheat ability, isn’t it?