Quick Transmigration: The Villainess Is a Sweetheart - Chapter 4

After Xiao Lingyu was betrayed by her boyfriend, she had the scumbag underneath her feet and along with the slut. Then, she used the spatial jade pendant to return to her hometown and began planting. She planted, planted, and planted before selling, selling, and selling. After that, she built, built, and built. She went on a frenzied path of establishing her farm kingdom, running further and further away!

In the City of Crime, one law stands above them all: Only the strongest can live.

It begins on the mountain.

With the glint of a knife, a flash of steel in the hands of a sworn brother. A betrayal.

Stabbed and pushed down the mountain, Zi Chen lied within the red-stained snow, left to die.

This is where it begins; he is given life by lightning,
baptized by thunder.

Those who had once betrayed him should all suffer in his cruel revenge.

- Description from Novelupdates

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.