Beyond the Script: The Extra Who Stole the Mangakyo

Chapter 5: Chapter 5

Chapter 5: A New Body, A New Burden

I woke up feeling like I had been hit by a carriage.

Everything ached. My muscles felt both stiff and sore, as if I had been through a week of intense training in a single night. My head pounded, and my vision was slightly blurry before it settled back into focus.

For a second, I thought I was still in the hospital bed back on Earth. That maybe all of this—the transmigration, the Mangekyō Sharingan, the academy—was just a fever dream caused by my illness.

But then I moved.

And immediately regretted it.

"Ugh..." I groaned, sitting up slowly. My entire body felt wrong—not in a painful way, but in a foreign way.

It took me a moment to process why.

This wasn't my original body. It was Alden Blackwood's.

And last night, I had essentially forcefully modified it—both by awakening the Mangekyō and by ranking up from F- to E-.

The result?

My body wasn't fully synchronized with my mind.

I tested it by clenching my fist. There was a slight lag between my intent and my muscles responding. It wasn't anything extreme—maybe a fraction of a second—but it was enough to throw off my reflexes.

It made sense. Back on Earth, I had spent years in a hospital bed, barely moving. Even though I had been given Alden's healthier body, my mental reflexes hadn't caught up yet. The sudden increase in physical stats didn't help either.

I sighed and ran a hand through my hair, only to pause when I felt something different.

My hair.

It was longer. Not by much, but definitely enough to notice.

I scrambled to the small mirror on my desk and took a good look at myself.

My previously dull black eyes now had a slight red tint to them, even in their normal state. My hair, once neatly trimmed, had grown slightly wilder overnight. Even my facial structure seemed sharper—more defined.

"The hell..." I muttered.

Had the Mangekyō physically altered me?

It made sense in a way. The Sharingan was a genetic ability, something that fundamentally changed a person's body at a bloodline level. Since I had forced its awakening through a ritual instead of naturally evolving into it, my body was adjusting in ways I hadn't expected.

And this was just the start.

I needed to properly gauge my strength now that I had ranked up.

In this world, power levels were classified from F- to SSS, with each rank divided into three sub-ranks (Low, Mid, High).

The Ranking System:

F-, F, F+ → Complete weaklings. Normal humans with barely any mana.

E-, E, E+ → Marginally stronger. Can at least survive in a fight.

D-, D, D+ → Trained individuals. Some knights and mages start here.

C-, C, C+ → The level of adventurers or noble elites.

B-, B, B+ → A cut above normal humans.

A-, A, A+ → A big leap in power.

S-, S, S+ → A level beyond human limitations. Extremely rare.

SS-, SS, SS+ → The strongest warriors on the continent. Legendary status. @@novelbin@@

SSS → A rank only achieved by a select few in history.

Right now, I was at E-.

That meant I was marginally stronger than before, but still a weakling in the grand scheme of things.

And the biggest issue? The gap between ranks wasn't linear.

The difference between F+ and E- was small. But the difference between A+ and S- was like night and day. At higher levels, even a single sub-rank could mean the difference between being a strong fighter and being completely untouchable.

In the game, an S-Class character could demolish entire armies on their own.

And the protagonist? He would eventually reach SS+—an absolute monster in terms of strength.

If I wanted to survive in this world, I needed to climb the ranks fast.

My Immediate Problems

1. Mana Drain – The Mangekyō was ridiculously mana-hungry. If I wanted to use it properly, I needed to find a way to increase my mana pool and recovery speed.

2. Physical Synchronization – My body was lagging behind my mind. That meant I had to train to fully adapt to my new reflexes.

3. Low Combat Ability – Even though my perception and reaction speed had improved, my actual fighting ability was still garbage. I needed combat experience—and fast.

4. Hiding My Powers – If someone found out about my abilities, they'd either try to kill me or use me. The last thing I needed was to attract the attention of the church or the protagonist's party.

The Plan Moving Forward

I had six days left before classes started.

Day 1-2: Mana Control Training. I had to increase my capacity.

Day 3-4: Physical Combat Training. I needed to fix the lag in my movements.

Day 5-6: Experiment with Genjutsu and Kamui. Test how much I could safely use.

At the same time, I would lay low and avoid drawing attention.

At least, that was the plan.

Whether or not the academy let me stay in the background... well, that was another problem entirely.

For now, though?

I flopped back onto the bed and groaned.

"This reincarnation thing is more exhausting than I thought."