The One Punch Man (a.k.a Saitama) in Demon Slayer

After surviving the madness of Saitama's Ramen Sprint, Tanjiro, Zenitsu, and Inosuke collapsed in the training hall, thinking they might finally get a break. But fate—and the Hashira—had other plans.

The doors slid open, and Giyu Tomioka, Shinobu Kocho, and Sanemi Shinazugawa stepped inside. Their faces were serious, even more than usual.

"Enough of that… ramen nonsense," Sanemi growled, his arms crossed. "It's time for real training."

"B-but Saitama-sensei said ramen delivery was—" Tanjiro started, but Shinobu cut him off with a sweet smile.

"That's fine and all, but if you can't even dodge my poison or withstand Giyu-san's sword techniques, you won't last against Upper Moons. And…" her smile sharpened, "Saitama won't always be there to save you."

Zenitsu shivered violently. "W-what exactly are we doing today?"

"Three Hashira… three students…" Giyu said quietly. "Each of us will take one of you for personalized training."

"OOOH!" Inosuke jumped up. "I want the scarred one! He looks violent!"

Sanemi cracked his knuckles. "Perfect. I like smashing idiots."

Zenitsu immediately ran and hid behind Tanjiro. "Please let me train with the butterfly lady! At least she won't punch me to death!"

Shinobu gave him a sugar-sweet smile. "Oh Zenitsu-kun, don't worry. My training is very… gentle."

Zenitsu didn't trust that smile for a second.

That left Tanjiro with Giyu. The Water Hashira simply nodded. "Let's go."

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Sanemi & Inosuke: Savage Training

The moment they reached the training ground, Sanemi threw Inosuke into a pit filled with sharp rocks.

"Climb out without breaking a bowl of ramen," Sanemi barked.

"WHY IS THERE STILL RAMEN INVOLVED?!" Inosuke yelled.

"Because if you spill it, I'll make you drink swamp water instead."

Inosuke cackled. "This is the BEST TRAINING EVER!"

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Shinobu & Zenitsu: Deadly Dance

Zenitsu stood trembling while Shinobu twirled her sword elegantly.

"Our training is simple," she said. "You must dodge my poison blade for five minutes. If you get cut… well, I do carry antidotes. Maybe."

Zenitsu screamed and ran in circles as Shinobu gracefully floated after him, flicking her sword with playful precision.

"WHY AM I BEING CHASED LIKE A BUG?!" Zenitsu wailed.

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Giyu & Tanjiro: Water Mastery

Tanjiro stood at the waterfall as Giyu silently handed him a wooden sword.

"You've mastered basic Water Breathing," Giyu said, "but you rely too much on forms. True mastery means flowing without thinking."

With no further warning, Giyu attacked—his movements so smooth it was like the water itself had come alive. Tanjiro barely blocked, feet sliding on the wet rocks.

This wasn't just swordplay. This was survival.

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Meanwhile: Saitama Watches from the Roof

Saitama sat on the roof of the mansion, munching on a rice ball, watching all the chaos unfold below.

"Man… training here is way weirder than I expected," he muttered.

Genos stood beside him, notebook in hand. "Should I also engage in training, Sensei?"

"Nah. You'd probably break something."

They both watched as Zenitsu tripped into a bush, Inosuke wrestled a rock, and Tanjiro got launched into the waterfall.

"…I kinda want ramen again," Saitama said.

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To Be Continued…

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