Overlord Tamer: All My Pet Monsters Have God Potential - Chapter 9: Mutation On Variant

When Su Jiu dies on her eighteenth birthday, she transmigrates into a novel about painful love and becomes an adorable four-year-old child.

What if you spend your whole life like a vegetable in a hospital bed? Only being able to speak and listen. Just that. Would you go crazy? Unbalanced? What if it was all the fault of a degenerate madman looking for his parents' inheritance? Would you be angry? Would you be mentally broken?That was Kayden's life for 20 years and as quickly as it started, it ended, but luckily for him, reincarnation existed and by some miracle, he still had his memories of it. And....his new world had...magic.In the first moment of consciousness, Kayden made a promise to himself, in this life, he would achieve everything, he would reach the height of power, he wouldn't give a damn about women or money, futile things that would condemn him to mediocrity, his focus was to have the power to rule his destiny, this time he would not be a slave to his own life, he would be a monarch.

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

Reiji Saeki, who lives in the north eastern countryside town, lost his life in an accident during summer vacation. ……But before he knew it, a mysterious ball of light hovered in front of his eyes in a world of whiteness. That ball of light was a magician from a parallel world, and is looking for a person qualified to inherit the magic they had created to prevent it from being lost. Reiji, who rode on that suggestion, now lives in the parallel world Elgin, with a new body and powerful magical power.