Tensei Shitara Slime Datta Ken (WN) - Chapter 334

Michael, an ordinary and average guy, suddenly finds himself in a dangerous fantasy cultivation world after being randomly chosen in a multiversal lottery. Armed with a wish system that may taunt him some times, grants him one wish every week, Michael has to survive in this harsh world of cultivators, monsters, and mysterious powers. However, the system has strict rules—he can’t wish for direct power.However average Michael was, he loved his family on Earth and that's why his main goal is to return to Earth. To do that, he must climb to the highest realm of cultivation, all while avoiding greedy enemies and dangerous beasts. With each wish, Michael gets closer to his goal, but the challenges only grow tougher as the world around him becomes more dangerous.

Entering the mortal world for a hundred generations, do not compete for the youth of one life, but only for the day and night of a hundred generations.

Seeking immortals in the world of mortals.

My name is Li Qing. I have escaped from the mortal world in the third life, entered the Tao in the ninth life, and become immortal in the hundredth life.

(longevity stream, non-simulator, non-reincarnation rebirth)

(Bai Shi Shou Yuan, One Life Life)

- Description from novelbuddy

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.