Here's the revised passage with names corrected:
As soon as Youyu moved his arm, he realized two other ninjas were holding him back. "Why are you holding me?" he asked, puzzled. After a moment of drunken contemplation, his eyes lit up. "I see! You must be spies from other villages!"
In his mind, the situation was clear: these three were spies sent to infiltrate the academy. And as a Konoha ninja, he couldn't just stand by. "Spies, prepare to die!" he shouted, summoning his strength.
"What the—" Shisui barely had time to react before he felt a powerful force as he and another Anbu were flung aside.
"You spies, I'll take care of you! Teacher, leave this to me!" Youyu declared, unsheathing his blade with a look of confidence.
"Is this really the strength of a ninja school student?" Shisui thought, watching Youyu in disbelief. He hadn't expected Youyu to throw both him and another Anbu with such force. Though Shisui had been unprepared, he knew he hadn't had that kind of power at Youyu's age, and he was considered a top Uchiha genius.
On the side, Tanaka was at a loss for words, staring as Youyu confidently brandished his sword. "When did Kakashi and the others become enemy spies?" he thought, feeling slightly dizzy.
Youyu, meanwhile, had honed in on Kakashi. "Alright, you short spy, you're clearly the leader here! I'll take you down first!"
"Short spy?!" Kakashi's eye twitched. Not only was Youyu completely mistaken, but he had brought up Kakashi's old grudges from their academy days, when he'd been "taught" by Youyu more times than he wanted to remember. With frustration boiling over, Kakashi stopped Tanaka from explaining.
"Sensei, technically, Youyu hasn't had his practical exam yet, right?" Kakashi said calmly, his hand on the hilt of his father's blade.
Tanaka blinked. "Uh, yes, technically," he replied, confused.
"Then I'll be Youyu's opponent," Kakashi said, glaring at Youyu. After two years of real combat experience, he was sure he could finally defeat Youyu.
Excited murmurs broke out among the students as Kakashi stepped up, many wondering if this would finally be the moment someone could stand up to Youyu.
"Youyu, go for it!" Rin cheered, while Kurenai looked on with concern.
Hearing their voices, Youyu's determination grew. "I'll take down this little spy for the good of Konoha!" he shouted, gripping his sword.
Kakashi felt his entire face twitch. Spy? He could ignore being called "little," but "spy"? "Youyu!!" Kakashi roared, drawing his blade.
"Ah, so the little spy knows my name. Impressive," Youyu remarked, slightly surprised. Seeing Kakashi rush toward him, he grinned, tightening his hold on his sword. "I'll use this chance to try out the Steel-Slashing technique."
Swordsmen are typically divided into three realms: Swordsman, Swords Master, and Great Swordsman. Ordinary swordsmen can only cut at close range. But if a swordsman reaches the level where they can "hear the breath of all things," they attain the ability to "slash steel," a skill that allows them to cut even solid steel or, at higher levels, water and flames.
With the help of his system, Youyu had not only heard the "breath of all things" but was already proficient with it.
"Moonlight Slash!" Youyu declared, lifting his sword, and then swung it down in one swift motion.
Shisui watched, the corner of his mouth twitching. Kakashi was far from within range, yet Youyu had still slashed. "Is he really that drunk?" Shisui thought, ready to intercept, but the air suddenly vibrated with power.
A dark purple slash, mirroring the color of Youyu's blade, shot from his sword and flew toward Kakashi like a freed beast.
Kakashi's eyes widened, but his battle instincts took over as he twisted to the side. The blade grazed his cheek, drawing blood, before continuing its path toward a towering tree, which split cleanly in two before collapsing with a thunderous crash.
"A… a flying slash?!" Shisui's face was filled with disbelief. Kakashi, too, was frozen in shock, unable to process what he'd just seen.
Before he could react, Youyu appeared before him, kicking him in the stomach. Kakashi collapsed to the ground, clutching his abdomen as Youyu held his blade to his neck. "Alright, you two," Youyu said, addressing Shisui and the other Anbu, "I've captured your leader. Surrender, or I'll finish him off!"
Kakashi struggled under the weight of Youyu's sword, marveling at its heaviness and sharpness. He could barely move. "Youyu! It's me, Kakashi!" he managed to shout.
"Kakashi?" Youyu blinked, his memory gradually clearing. The activity and the system reward seemed to shake off some of his drunkenness. He finally recognized Kakashi, remembering their academy days. "Oh, it's really you, Kakashi."
Kakashi, relieved to be recognized, relaxed slightly. "So… can you let me up?"
But Youyu only pressed the blade closer. "Kakashi, you traitor! How could you betray Konoha?"
Kakashi's face turned red with frustration. "Which eye do you see me as a spy, Youyu?!"
"Look, you're here at the academy trying to capture me," Youyu insisted, pointing to the school insignia. "Clearly, this is Konoha Ninja School!"
Kakashi was speechless, feeling his patience slip.
Seeing this, Kurenai and Rin hurried over, worried about the situation escalating. "Youyu, he's not a spy! Kakashi's here to… maintain test order," Tanaka quickly interjected, stumbling over his words.
"Is that so?" Youyu said, finally noticing Kakashi's Konoha headband.
Realizing his mistake, Youyu sheathed his sword and offered Kakashi a hand. "Ah, my mistake, Kakashi. Thought you were a spy."
Kakashi accepted the hand reluctantly, dusting himself off as he endured the students' curious gazes. He had just been taught another lesson by Youyu.
As Kakashi prepared to leave, Youyu called after him, "Wait! You still owe me a few bottles of good wine!"
Kakashi almost tripped mid-step, his face a mixture of frustration and resignation.