Idle Level-Up in Naruto - Chapter 58 - 57: Audience with the Daimyō

In a world where magic and sorcery flourish came a tale of a nobody who grew into a legend. Partake in the conquests and tribulations of a great army where warriors live day-to-day, seeking the thrill of combat.

Power and desire, money and strength, conscience and responsibility, the road ahead is at a loss, as a time traveler, Simon, where will he go, this is a leading mainstream novel with a relaxed daily life and a slow pace

- Description from novelbuddy

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.

After a period of 10 years, he now has time to freely recover. Having trained until he had excellent military and martial skill, he sweeps through various military districts and returns back to his hometown. Under the monitoring of a beautiful female cop, he re-establishes his family’s bodyguard service, protecting beauties and moving unhindered, his achievements causing the fame of his outstanding, god-level bodyguard service to resound across the world!

- Description from Novelupdates

Lin Qing He transmigrated into a novel and became one of its cannon fodders. The novel’s background is non-viable 1960s, a time of want to eat but nothing to eat and want to wear but nothing to wear.