The Heroine is My Stepsister, and I'm her Final Boss - Chapter 121: Primes

A person's perspective plays a vital role in developing one's personality. What happens when you realize the world you live in is the same as a Novel.

Zero Elea gets a Skill called Parallel Memory which allowed him to get the memory of his alternative self of a different universe.

He realizes that the world he lives in is similar to the novel he used to read in his alternative world. The world will face catastrophe in the future but there is no need to worry as there is a main character working hard to save the world.

And what about me? I am but a mob character.

The beauty and the taboo existing together.Unattainable and unacceptable.An existence only to be admired from afar.A hero of legends but a also a girl of tragedy.Shining like a star in the sky, all alone, forever…-But that’s too sad isn’t it?Our MC, an ordinary middle aged man, is an author that wrote books and after pouring 2 years of hard work in a book, his hardwork finally bore fruit as his book got the second prize in the regional awards.A fruit that he couldn't eat.Why?Because he along with hard work, he also poured his piss somewhere he shouldn't and died.Exactly how?Read the prologue, and you will find out~But of course, that's only the start, as the next time he woke up...He was in another world.

Haruto Hayase was a normal high school boy in his third year, living a quiet life until his younger sister, Haruka Hayase, joined the same school. Haruka’s beauty and charm made her the center of attention, quickly becoming the school’s prima donna. But when a notorious gang leader set his sights on her, he did everything in his power to protect her—only to fail tragically. Haruka was brutally assaulted and tortured, and Haruto himself suffered an agonizing death. However, in a twist of fate, Haruto is given a second chance, waking up a year before the events that shattered his life. Armed with the mysterious ‘Debauchery System Slave’, he vows to exact revenge on those responsible. This time, he will use his newfound powers of the system and charm to seduce the loved ones of his enemies. From their mothers, sisters, and lovers to their closest friends, Haruto will make them his. His enemies will suffer as he steals what they hold dearest, ensuring their downfall in the most devastating way possible.

[Character Deleted.]I deleted the character I had been raising for over 5 years.To finally defeat the final boss of Demon Fantasy—the one I could never quite beat.For the sake of defeating ‘Baal’.“…I can just start over. I can do it.”And then…[Special reward has been granted!]“What? A mythic-tier trait?”The perfect opportunity had arrived.“This time, for sure!”I’ll raise the strongest mage and take down Baal!At least, that’s what I thought when—[Welcome to Demon Fantasy.]I found myself inside a world teeming with 666 kinds of demons.And I had the ‘special reward’ I just received!“…Fine. Let’s see who wins this.”I was confident.After all, I’ve been a veteran of this game for 10 years.