MTL - Wonderful Life After Exchanging Fate - ~ Work related

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

Coming back from the magic world, Riya rebuked her shameless stepmother.She was back to her first life with the world treasure and thought that her life would be smooth sailing.But…What was happening with the environment?Why did the mana suddenly recover on this Green Planet?And why did those magic beasts also appear?Riya: ???Ah, Riya silently swore to secretly become stronger to deal with these magic beasts that went on rampage. She would use her runes to make a better life while watching the world recover from the destruction.Unfortunately, things were not so simple.Her best friend’s brother suddenly locked his attention on her.“Ah, ah, ah, you don't have to mind me….”“The runes you make are really interesting. Can you show me more?” The man smiled and stepped closer.“I…I can, but can you please not come too close?!”Riya just wanted to meditate silently, so how did she suddenly attract this big boss’s attention?

A modern-day antihero, who was infamous for his devious acts, dies in an explosion meant to take down a powerful criminal syndicate. Waking up in a world of sword and sorcery, he finds himself possessing a fragile, powerless body with a strange “System” that seems broken. Initially thinking he's doomed, he learns that by pretending to be weak, he can manipulate others into revealing their secrets, granting him abilities they possess. As he rises in power, he discovers that the System was intentionally sabotaged—by none other than his own future self.

She was originally an assassin. After rebirth, she was reduced to another world’s Di family’s most inferior concubine-born daughter. With an extremely hideous appearance and no way to cultivate, she was the object of everyone’s humiliation and bullying.