From Overlord To Multiverse. - Chapter 29: Strongest Demon Slayer

Magic, eastern fantasy, cultivation, scientific technology…

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

That night, when a Kryptonian spacecraft with a baby fell on Mike Kent’s farm, when he decided to adopt the child, and the golden finger that traveled through was activated, he knew that his life was about to change.

Superman Clark Kent, Professor X Charles Kent, Magneto Eric Kent…

When he became the father of these people, the strongest family was born!

- Description from novelbuddy

Ethan accidentally rode the wrong train and ended up in Brynhildr Magical Academy where Wizards and Witches are taught on how to use Magic.As someone who didn't have any magic powers, he thought that he would be punished for being in a place where he wasn't supposed to be. Fortunately, due to a stroke of luck, the teenage boy managed to avoid the worst case scenario, and ended up staying in the Magic Academy to learn magic.Ridiculed by many for being magically crippled, Ethan strived to adapt to his new school life with the help of his new friends, who made him realize what True Magic was all about.