The Extra's Rebellion - Chapter 21: World Geography.

Suddenly being able to travel to various familiar worlds, to grow and develop in these various high-risk worlds, you need to follow the following guidelines:

1: If you want to get rich, don’t be afraid of death. If you are afraid of death, you can only eat other people’s leftovers.

2: Don’t always try to save the world, it will be bad luck to be a Virgin in other planes.

3: Don’t let go of good things, maybe you will lose a great opportunity because of this.

4: Don’t wantonly flood your feelings, you can only bring back sadness if you can’t take away the girl.

……

- Description from novelbuddy

Nidel, who belonged to the Technological Magic Order that held low prestige, became the bodyguard of a foreign prince behind the scenes. Left with no choice, he assumed the role of a bodyguard, turning into a black cat using the transformation magic he prided himself in, but the one who assumed the role as official bodyguard was the Royal Knight Legato. Nidel, who one-sidedly held feelings of affection towards Legato, thought of this circumstance to be interesting, butー

More than ten years later, this sentence gradually spread in Elbaf Continent:

Never use magic to deal with tyrants, because you will find that he will return your spells to you thousands of times after being strengthened by countless magic specialties.

This is the story of a dragon-shaped self-propelled fort that keeps doing things in another world.

There is nothing that one magic can’t fix. If there is, then there are more. ——Izawa

- Description from novelbuddy

A data loving young man from Earth has an accident which transports him to a dark land filled with terrifying creatures and magical powers. Fortunately for him, he has a Biological Assistance Chip to ease his path. However, things in this bizarre and strange world are not always as they seem, and, though it is a tremendous asset, the chip doesn’t always work as expected. With all of the crazy creatures and magical mayhem around him, one can only wonder what the future holds for this young man…

- Description from novelupdates