"But I see you're out of money. I wouldn't mind if you paid off your debt with your body."
The casino boss spoke with a lecherous grin, looking like a pig drooling over meat. The men around him wore the same disgusting expressions.
Sora, who had been sitting silently beside Tsunade watching her gamble, felt his eyes turn colder than ice. His gaze became completely emotionless.
His body flickered.
In the next instant, his fist shot forward.
The casino boss—who had just finished spouting lewd remarks—had his heart shattered by Sora's Chakra-infused punch.
There was no hesitation.
Sora didn't even know why he had acted so decisively.
He only knew one thing—across both his lives, nothing and no one had ever left a mark on his heart.
Except Tsunade.
She had given him a new life. She had changed his fate. She had cared for him as he grew, guiding him step by step toward becoming a true expert.
She was the only person who mattered to him.
And he would never tolerate anyone disrespecting her.
What was the point of power?
Wasn't it to live freely and protect what one cared about?
Anyone who dared to touch his reverse scale would die.
If someone possessed strength yet allowed themselves to be bullied and their taboo violated, then they were nothing but a fool. They might as well stop cultivating altogether.
The punch was more than enough.
The casino boss was an ordinary civilian. Sora's physical strength was already several times that of an adult.
After daily combat against Tsunade and Shizune's Shadow Clones, his Chakra quality and control had improved tremendously.
A punch infused with Chakra could easily produce the force of a thousand jin.
A direct strike to the heart—there was no surviving that.
Even though he had not yet learned Tsunade's Monster Strength Fist, his full-force blow was far beyond what a normal person could endure.
"Murder!"
The casino instantly descended into chaos.
Every casino had guards—so-called bouncers. Now that their boss was dead, they would be held responsible. The boss's family would never spare them.
Dozens of burly men rushed at Sora with killing intent.
"Water Release: Water Clone Jutsu!"
A long saber slashed toward Sora's body—
—but the blade cut through water. His figure dissolved into liquid and splashed across a gambling table.
"Damn it, he's a ninja!"
Panic erupted. Even the weakest Genin was more than enough to deal with ordinary civilians. To them, a ninja was practically a superhero.
"Water Release: Water Clone Jutsu!"
Sora felt no discomfort despite killing for the first time. Instead, his blood boiled.
This wasn't sparring with Shizune anymore.
These men were attacking with real killing intent.
The overwhelming assault placed genuine pressure on him.
A Water Clone formed beside him.
The original body and clone moved in perfect coordination, using the casino's terrain to their advantage. One by one, the burly men were knocked down.
Though trained and armed, they were no match for Sora, whose combat instincts sharpened rapidly in the chaos.
"Lady Tsunade, look—Sora is growing in battle!" Shizune said, surprised.
"It's normal," Tsunade replied calmly. "Life-or-death combat is what forges true experts. Let's go, Shizune."
She wasn't angry about Sora's sudden killing.
In fact, she felt a faint sweetness in her heart.
The casino boss had harbored malicious intentions. For the usually indifferent Sora to strike so fiercely proved her place in his heart.
Why would she be angry?
She had survived the Second Ninja World War and killed countless enemies. Why would she pity people who had ill intentions toward her?
By the time the battle ended, Sora was drenched in blood.
Dozens had fallen.
Through clever use of Water Clone Jutsu and multiple Substitution Jutsu variations, he had dismantled the encirclement.
He realized that his understanding and application of ninjutsu had risen to an entirely new level.
Killing dozens for the first time had baptized his spirit in blood.
His Aura grew sharper.
His mind became fiercer.
After leaving the casino, Sora changed into clean clothes and washed away all traces of blood.
He knew Tsunade suffered from hemophobia. The sight or smell of blood could affect her deeply.
He made sure he was completely clean before approaching her.
At the same time, he had already begun thinking of ways to help her overcome it.
For a ninja—especially a Kage-level expert like Tsunade—Fear of Blood was a fatal weakness.
"Do you know what you lacked in that battle?" Tsunade asked.
Sora replayed the fight in his mind.
"Lack of one-hit killing power."
If he had possessed overwhelming offensive strength, he wouldn't have needed to rely so heavily on Substitution Jutsu and Clone Jutsu to evade and defend.
Facing dozens of armed men while unarmed himself meant constant pressure.
"That's right," Tsunade nodded. "Your speed is sufficient. Your reactions are sharp. Your control over your body and Chakra is satisfactory.
So starting today, besides teaching you new ninjutsu, I will also teach you my ultimate secret technique."
Shizune looked surprised.
Sora's eyes shone with anticipation.
"Monster Strength Fist?"
Tsunade was one of the Legendary Sannin not only because of her abnormal Medical ninjutsu, but also because of her terrifying combat ability.
If not for her long absence from battle and her Fear of Blood, her Monster Strength Fist alone would make all Kage-level experts wary.
Rust from inactivity could be fixed. Her foundation remained solid.
As a master of Medical ninjutsu with extraordinary Chakra control, she only needed one real battle to return to peak condition.
But if her Fear of Blood remained unresolved, it could cost her life.
"That's right," Tsunade said.
"But don't think it's easy. With your current Chakra control, even concentrating Monster Strength into just your fist is extremely difficult. Forget applying it to any part of your body."
If Monster Strength Fist were easy to learn, countless experts from the Five Great Villages would have already mastered it.
Yet to this day, Tsunade remained the only one capable of wielding it at such terrifying levels.
Learning it was difficult.
Reaching Tsunade's level was even harder.
And being able to apply Monster Strength to any part of the body—waist, legs, even tongue—while maintaining destructive power…
That was nearly impossible.
...
📢 Author's Update
The fanfic "Naruto: Raised by Kushina, Took His Brother's Wife" (Part 1 & Part 2) is now officially complete! 🎉
All 120 chapters (Part 1 & 2 combined) have been fully uploaded on Patreon.
📚 Category: Naruto
🔗 Read here: patreon.com/Shadow_demon_007
Thank you all for your continuous love, support, and patience for this story 💙