Shinobi No Ittoki (dub) Episode 5 <95% TRUSTED>

"I'm not going to kill you," Ittoki said, his voice steady for the first time. "Because if I do, someone else will come for me. And then someone will come for them. I’m done being a spoke in your wheel."

As if on cue, a flurry of shuriken whistled through the air. Ittoki reacted by instinct, his Iga-built suit whirring to life, enhancing his speed just enough to deflect the steel. Out of the darkness stepped Haruka, a Koga student whose eyes held a fanatical gleam.

"You're hesitant, Ittoki," Kousetsu’s voice came from the shadows, cold and precise. She didn't look at him, her eyes fixed on the treeline where the Koga students—the 'elites'—were surely waiting. "In the world of shinobi, hesitation is a death sentence. The Koga don't care about your heart; they care about your head." Shinobi no Ittoki (Dub) Episode 5

Here is a story expanding on the themes of that episode, focusing on the weight of heritage and the "cycle" that traps these young ninjas. The Weight of the Blade

Haruka hit the ground, gasping for air. Ittoki stood over him, his breathing ragged. He had the opening. He could have ended the cycle right there. "I'm not going to kill you," Ittoki said,

It seems you are looking for a story inspired by of the English dub of Shinobi no Ittoki . In this episode, titled "Cycle of Fate," the tension between the Iga and Koga clans reaches a boiling point during the Ninja Academy exams.

In a desperate maneuver, Ittoki used his suit’s exhaust to create a smoke screen, not to escape, but to close the distance. He didn't strike with a blade. Instead, he used a palm strike to the chest, a move his mother had taught him—not to kill, but to disarm. I’m done being a spoke in your wheel

Kousetsu watched from the trees, a flicker of something—perhaps hope—crossing her features. The cycle hadn't broken yet, but for one night, in the heart of a simulated forest, the wheel had stopped turning.