Maybe a Fake Gintama - Chapter 59: Life Is Full of Scenes Where You Encounter Some Unexpected Things, but They Are Always Boring.

On one dark night in Tokyo, japanInside an abandoned factory…Shizuka Marikawa, a working woman was returning from her work but ran into an unfortunate situation where she almost lost something more precious than her own life but got saved at the last second by someoneShe couldn't help but look at the boy in front of her with wide-opened eyes as she was too stunned to speakAll she could do was stare at a boy with white hair soaked in blood as Around him was nothing but corpses of humans he just killedAnd From this instant, she instantly knew the boy was not human at all because, unlike humans, he had one red eye as he had some weird things coming from his back which he used to pierce through human chests with ease‘monster’ Shizuka Inwardly said this as this was the only answer to her questions even though she said this but she somehow also knew he wouldn't harmShizuka is someone who has always been able to read the intentions of other people from their faces due to events that keep happening in her life which is the reason can tell this boy or a monster moreover she found nothing in his eyes but sadness and painMaking him very pitiful in her eyes, since even though he himself is in so much pain and sadness and even then he is saving herIn her eyes, He is not only Pitiful but also very kind“Please come with me!” Shizuka blurted it out unconsciously even though she had no idea what she was saying because she said it instinctivelyOr maybe she knew? She just knows she can't leave him alone otherwise this boy will be all alone as she decided to take him with HerThe boy couldn't help but look at the woman with a cold graze even though it seemed cold but inside he was very confused as he was even considering a woman's mental healthUnknowingly at this moment, the boy made a bond that he never imagined in his entire lifeUnfortunately for them, his and Shizuka's lives will be totally flipped upside down soon due to unseen events..…

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Nobody thought the end of the world as they knew it would come like this.In a dystopian future, 95% of the population was sent to another universe, one resembling the game Jack had played, “Elder Heir Online”.He would've normally enjoyed such an opportunity, but the company 'DiveCore', from his real world, came along.As long as any of them breathed, his revenge wouldn't be complete.Using his knowledge of the game, and willingness to go through the worst to exact vengeance, he will slowly become what he avoided when he played the game in the real world: a villain.