I'm Scattering IQ to the Protagonist - Volume 3 Chapter 56.2

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!

After reincarnating, he realized that he was endowed with a miraculous game-like system, which enables him to increase his own stats and transcend the limits of the human body. This system even has a game-breaking ability to save and load in real life!

In this new world that’s akin to a 2-D game, he just wants to enjoy life and head for a glorious future… However, he is quickly embroiled in a complex plot. Can he unlock his true potential and utilize his system to break the shackles that confine him and discover the truth about his previous body’s circumstances?

- Description from novelupdates

After dying, you wake up and realize you've been reincarnated as a background character who is judged as human trash.The decision to change your destiny comes instantly.Discovering that your identity isn't as simple as you thought, you feel favored by the heavens when you manage to become a powerful character.Katase: You won't fool me. I'll expose you for the pervert you are.Murayama: ...Thank you for saving us.Issei: Motohama, what happened to you? How are you so powerful?Rias: If you join my peerage, I wouldn't mind being yours.Sona: You beat me in the game. That means you're now my fiancé.Yasaka: Honey, Kuno wants a little brother.Kaori Houjou: Shinji-kun, let's go on an adventure.Kaede Kazama: Shinji-kun, thank you for saving me from that ball.Rie Sawada: Shinji-kun, I'll wait for you. You'll be my future husband, fufufufu...Changing known history and taking it in a direction not even his eyes could perceive, he didn't stop no matter what. Not even the other world was safe from his clutches.Lexia Von Arselia: My hero, and my future husband...Shinji advances without stopping.“I, Shinji Motohama, swear here and now that I will reach the top of both worlds.”

Dimensional Knights—legendary heroes who uphold order across the infinite realms. Wielding powers beyond comprehension, their purpose is singular and unwavering: to preserve the balance between worlds and defend against the ever-looming threats that seek to plunge them into chaos.Zane, a boy from Earth—one of the weakest and most forgotten realms—had his world forever changed the day he first witnessed the awe-inspiring power of the Dimensional Knights. In that moment, a dream was born. He wanted to become one of them. A hero. A symbol of strength and salvation.But fate had other plans.One tragic event shattered his world and dragged him into a downward spiral from which there was no escape. As the years passed, the dream that once filled him with hope twisted into something far more desperate. Becoming a Dimensional Knight was no longer about admiration or ideals—it became his only path forward. His only way to fight back. His only way to reach those who caused him immense pain and blood.Now, Zane's journey is not about heroism. It's about vengeance, survival, and rewriting the destiny forced upon him by those who wished for his death.Unbeknowst to him, this very path he was taking would change the order of the world forever.