She's a Passerby, But Can See the Protagonist's Halo - Chapter 18

Mythical Abode Mountain, Cloud’s End Cliff, the most dangerous of Azure Cloud Continent’s four deadly areas. Cloud’s End Cliff’s base is known as the Grim Reaper’s Cemetery.

An unsealed condom package shattered her steadfast adherence to and fantasies about love, causing the beliefs she had clung to in her heart to collapse in an instant. Liman discovered that not only had her husband been unfaithful, he had also transferred assets and even tried to frame her to get her to leave with nothing.Facing her husband's betrayal, Liman began to seek vengeance!

Travel through Naruto and become the son of an ordinary civilian Chunin.

In this life-like world,

He obtained the golden finger to speed up the practice of ninjutsu,

Let ninjutsu itself produce a magical change from decay.

The knife cuts the jade, and the water bomb breaks Suzuo.

- Description from novelbuddy

Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the very world, only to meet an end filled but with betrayal. The companions that he’d trusted throughout his journey betrayed him and killed him by sticking a blade through his chest.