Konoha, Reported by the Fourth Hokage at the Beginning

Year 32 of Konoha

It was lunchtime at the Ninja Academy. Kenshi, a newcomer from Earth, accepted a rice ball from Minato, whose smile was as bright and warm as the sun. As he took a bite, Kenshi couldn't help but think about Minato's tragic fate.

"To change the ninja world, I need to start by saving the Fourth Hokage, Namikaze Minato," he thought to himself.

But fate had other plans. Before Kenshi could even begin his mission, Minato who noticed something off about Kenshi. Turned him in to the Anbu, Konoha's secret police. Kenshi was then sent to a special interrogation room, a place reserved for spies.

Kenshi inside the room, stared blankly. Betrayal. He had been betrayed by the very person he intended to save. His original plan was in ruins. Now, he had a new mission: Destroy Konoha.

[Fair warning: The protagonist can be stupid. There's racism which you can expect from CN authors. The MC is a twisted mf due to betrayal, he doesn't see the world as real after what happened to him.]