Son Goku Journey to Multiverse

After the battle with the Shadow Dragons, Goku had to bid farewell to his family and friends and follow Shenron.

Knowing how sad and also Goku's contribution to the world, Shenron allows Goku to travel to other worlds.

Those start a journey where Goku experiences other-world culture, food, and also their power system.

This is the GT Goku version, where his power level is Limit Breaker Super Saiyan 4. In this story, he will be overpowered. Additionally, this story focuses more on the slice-of-life aspect of Goku's Journey. There will be more action, but it's like all the fights with Goku that end up like Saitama.