In Dragon Ball Time Travel, I Have the System to Roam Freely

An otaku from the 21st century suddenly accidentally traveled to the Dragon Ball world while watching Dragon Ball anime at home. He also obtained a powerful system from an ordinary Saiyan on Planet Vegeta, so he began his invincible journey in life. At the beginning, he deposed King Vegeta, took in a younger brother, built a kingdom, destroyed Frieza, became the protagonist, fought against Siru, destroyed the God of Destruction, and challenged the king in his full glory. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.