You are the god of another world. There, a demon lord has been causing a lot of trouble, and will soon destroy the entire world if not stopped. As a god, you can't physically interact with the world, so you decided to use a hero from another world to defeat him, you will accompany him throught his entire journey. You then decide to call your one and only friend: Truck-kun! Soon enought, a random guy appears on your pocket dimension

Kai: W-where am I...? I remember being hit by a truck... And... W-who are you?! Confused scream It's up to you now!