System: Replicating The Heavens - Chapter 6 Ch 6: Becoming Stronger

Amakawa Haruto died before he’d the chance to reunite with his childhood friend who disappeared five years ago. Rio, a young boy living in the slums seeks revenge for his mother who was murdered in cold blood in front of him when he was only five years of age.

There exists the earth many knows of and there exists an alternate world. Two people, each with their own backgrounds and values. For odd reasons, the memories and personality of Haruto, one who should have died resurrects in Rio’s body. As the two are confused over their memories and personality fusing together, Rio (Haruto) decides to live in this new world.

Along with Haruto’s memories, Rio awakens an unknown but special power. If he’s to use it, it looks as if he can live a better life, but before that, Rio encountered a kidnapping which results in involving the two princesses of the Bertam Kingdom.

After saving the princesses, Rio is given a scholarship to attend the Royal Academy, a school for the rich and powerful. His background being a poor orphan who once lived in the slums, the school full of nobles was rather a detestable place to stay at.

Gu Changge, a noble lady from a wealthy family, is a well-known business legend in Yuncheng, going into business at 15, taking over as President of Gu Group at 18 and becoming Chairman of the family business at 30.
She is murdered by her husband Shao Tianze, just to give his mistress Gu Changle a healthy heart. But a premeditated car accident makes Gu Changge revive in a new guise and settle into an 18-year-old girl, Song Yunxuan.
The new face, young body and experienced soul become her weapons of revenge. In her struggle with the four big families in Yuncheng, can Gu Changge shrink back? Will she open her broken heart again? Can she always head off dangers in power struggles?
Let’s find out if Gu Changge can revenge herself and create glory again.

- Description from Novelupdates

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.”

“It’s true… So why does no one believe me?”Sometimes, I play small pranks, but they’re really just small ones.I’m not the mastermind at all.