Reborn at Boot Camp: General, Don’t Mess Around! - Chapter 8 - Be A Dignified Person

An underprivileged prodigy, a cruel, ruthless world, and an epic story of battle and conquest. A young man with an exceptional inheritance leaves the small, rural city from which he hails on a journey to find the girl of his dreams. He defeats countless prodigies, sweeps through all forces that dare to stand in his way, and progresses step by step toward the pinnacle of all the worlds!
“I’m not targeting any gods in particular. All I’m trying to say is that all gods are trash in my eyes!”

He was very happy to be reborn, but why was he sixteen again, he can’t bear to look back at that time.

Why does he return to being sixteen years old, yet still meet Doomsday?

It’s alright to encounter the end of the world, so why did he have to fall in love with someone?

Even if he falls in love with another person, why did it have to be a man?

Falling in love with a man is also alright, so why did it need to be a secret one-sided love?

Even a secret and unrequited love is alright, so why is that man his….

- Description from Novelupdates

“Give me a bunch of adorable players, and I can easily overturn a parallel world!” - so said Reveno·Murphy·Le SenbulaPs:The titles owned by the honorable Murphy include but are not limited to counterfeit vampire, celebrated NPC role-play artist, multi-talented Dog Planner, the only savior of Transylvania, benefactor of the old continent, defender of the new continent, brave and loyal earl, irredeemable big-sister fanatic, spotless saint of the Blood race, Alpha of the Night's Guard, and so on (here ignoring the other 108 nicknames). He's indeed the homebody of the Fourth Cataclysm and the best old friend when you need to clean up a mess, thus all testers of “Real Different World,” please stand up when you see this line! Let us give Lord Murphy the highest respect!Murphy, ka-ka! Full marks!

Traveling to the wizarding world, Eli found that he was an Eternal.

Life is infinite, life is immortal.

“What? The talent is very poor, then I will meditate for ten years, centuries, and thousands of years, and I can always meet the promotion requirements.”

“This skill is hard? Oh, let me study it for decades to see if it’s really that hard?”

“Consuming life force, improving mental force, and this kind of good thing.”

“The enemy is here? Oh, let me find a place to hide for a thousand years, until his lifespan is exhausted and his mental power dissipates, and then I will come out again, free and endless void.”

…

This is the story of an immortal who lives in the wizarding world and then kills the endless world.

- Description from novelbuddy