Grim Reaper in the Apocalypse: Reaping Immortals - Chapter 421: Unusual Remedium

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

Meet Damon CrossAs a child, Damon Cross had to deal with the horrible realities of domestic violence and being homeless.He and his mother, who had always been there for him, struggled to find security.After losing his first backyard fight, When Damon gets a new MMA system, his luck changes dramatically.This mysterious system becomes his guide, improving his skills and raising him into the world of mixed martial arts.He learns more about mixed martial arts and gets better at it with the help of this system.With this renewed strength, Damon is determined to not only move up in the fight world, but also make a better future for both of them as a way to repay his mother for what she did.[YOU HAVE AWAKENED THE EMMAC SYSTEM][CONGRATULATIONS TO HOST FOR BECOMING A DOUBLE CHAMP]witness how Damon goes from a Bum to a Champ.Romance: YesFights: Yes

Witnessing her boyfriend cheating on her with her bestie, Shiyao was so angry that she went to a pub for fun and met a man, who was really a piece of work. After a crazy night she fled away, but was embarrassed to know that the man she slept with was her boss You Ze.
Jesus, give her a break!

- Description from Novelupdates

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.