Regressor Instruction Manual - Chapter 1: My talent level is below average (1)

So here's the pitch: I got reincarnated with Mangekyo Sharingan.Sounds overpowered, right? Instant win button?Except I can barely keep it active for thirty seconds without feeling like my brain's being microwaved. My chakra reserves are pathetic. My combat experience is zero. And the system that gave me these powers took one look at my situation and said “good luck” before fucking off into hibernation.Oh, and the Hero Killer—the guy who murders heroes for not being “worthy”—just decided my mom wasn't good enough. She'll never walk again.I know when he'll strike next. I know where. I've got exactly four weeks to train.Four weeks to go from “can't throw a punch without tripping” to “can survive a fight with a serial killer.”The smart move? Stay out of it. Let the pro heroes handle it.But I'm fifteen, angry, and apparently making life decisions with the wisdom of a shounen protagonist.At least I'm in General Studies. Low expectations.What does being a hero have to do with revenge anyway?

“On the Path of Eternal Strength”Sebastián lost everything when he was just a child: his mother, his home, his world. Thrown into a savage land, where monsters and death lurk in every shadow, he learned to survive. For ten years, every breath was a struggle, every step a battle.But one day, survival was no longer enough.Driven by a deeper longing, Sebastián decides to walk a different path: one of absolute perfection, where body, mind, and spirit are forged through martial arts and constant self-improvement.In a universe where power is everything, Sebastián will not fight merely to live—he will live to reach Eternal Strength.His journey will not be easy. Pain, betrayal, and glory will be his companions.This is not just a road to the top…It is the story of a soul that chose to transcend its limits.

A crumbling empire, a turbulent government, widespread chaos, and an international arena filled with covetous foreign powers—this was Spain in the latter half of the 19th century. Reborn as Carlo, the first Spanish King of the House of Savoy, his absolute priority right now is figuring out how to secure his throne.

Takebayashi Ryouma, a 39 years old man with hidden past, found himself in a strange white room. The gods tell him that he has died and that they are sending his soul to a different world, a world where magic exists. After living alone for 3 years, his gamer soul loses its common sense and starts along crazy routes.