Tomodachi no Imouto ga Ore ni Dake Uzai - Volume 2, Chapter 4: Only the Club Advisor is Strict with the Sports Club

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.

A maid who is beaten on behalf of a noble boy.

Some memories of her childhood were cruel, but Yuriel held no resentment towards the boy. Rather, she liked it–The hand that carefully applied medicine to her wounds was always warm.

“M-Master, stop, Raph, sa, save…ah, mm…!”
“That’s why.. I told you.. to wait.. till I returned.”

But the Raphlet that appeared in her dreams showed nothing but passion and lust.

Prophetic dreams.
The ability that was like a stigma drove Yuriel towards an unknown future.

All I want is to be next to you.

I transmigrated into the gacha game I abandoned for 10 years.But, the state of the heroes I raised is strange.

The teenager Long Ao, ten years of silence, was reduced from genius to waste, and was ridiculed and mocked.

Ten years of persistence, ten thousand failures, and finally won mysterious Dragon Seal.

With Primal Chaos Saint Body, cultivation invincible cultivation technique, refining Heaven and Earth, devouring endless stars, sweeping the wasteland! Ask the vast stars, who dares to fight me? Boundless Starry Sky, War God! …

- Description from Uukanshu