Great Heroes of Quick Transmigration

Do you want to become a hero, praised by everyone for saving the world?

Sign this contract, and you'll receive something you've always wanted, along with powerful superpowers.

You'll travel to other worlds, wipe out darkness and evil, and become a hero remembered by those worlds.

The moment you sign the contract, you'll be reborn...

PS: The worlds the protagonist transmigrates to have everything from magic to high technology.

A guide to this story:

1. This is a story about a protagonist who transmigrates to other worlds to save their people.

2. The setting doesn't stand up to close scrutiny.

3. It's unclear who takes which role in the relationship. Anyway, in an age when nothing below the neck can be written, it makes no difference who tops or bottoms.

4. This is (probably) a wish-fulfillment story.