Cosmic Professional Gladiator - Chapter 776 Ultimate Existence

On the will left behind by the 14 year old suicide victim K:

“Taku Sugawara is the devil. Nobody should believe his words.”

One day, I was given the mysterious power of Hwanmong.

What's it like to be wrongfully killed? Cheng Su felt she'd really hit rock bottom when she was yanked out of a building by someone who jumped. Talk about a true miscarriage of justice! But when she opened her eyes again, she found herself back in the eighties, replacing the 'culprit'? In her last life, she was clear and alone, but in this life, she had a promising, dazzling military husband, as well as a cocky and domineering third child? Ugh, spit on that! She had died with cheats, so since the husband was hers, she'd beat anyone who dared to snatch him—pummel one, annihilate two. She'd make gourmet food to sell at a stall, start a chain of restaurants, and earn the money herself. She'd have the children, flirt with her husband, and fight off any mistresses; as long as her military husband doted on her, all was good. With this cheat-code life, she wanted to eat well, drink well, gain both fame and fortune, and together with her husband, make a home anew! “This story is purely fictional. Please do not take it seriously or imitate it. Any similarities are purely coincidental.”

In the vast Marvel universe, where superpower was still slowly growing in its infancy, several peerless superheroes tried to find their path in The Marvel Universe. A young adult named Ron from modern Earth unwittingly stumbles into such a world and begins his journey with an unknown power. This is a magnificent yet unknown true marvel world! This is the story of a normal young adult and his adventures!

- Description from Novelupdates