Zero's Journey

He transmigrated into the world of Ultraman in his sleep and gained Zero's power. As his strength kept growing, Ultraman King punished him by making him start his training over from scratch. So he goes around the various Ultraman worlds fighting little monsters, occasionally picking on Ultramen, and flirting with the girls in there and all that.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.