I Transmigrated into Dragon Ball, but Is This the Majin Buu Saga?

[Congratulations, Host. You have successfully transmigrated to the Dragon Ball world.]

[Calculating the timeline... Ding! Calculation complete. The current date is September 1, Age 749...]

[Main quest activated: Become close friends with Sun Wukong and join the search for the Dragon Balls. Quest reward: Divine Power cultivation method...]

Looking at the words in the transparent window before him, Su Ming was so annoyed he could barely contain himself.

The quest itself was simple enough, but this wasn't the beginning of Dragon Ball. It was the Majin Buu Saga!

…

The Dragon Ball Z era has now ended, and the Super God Academy: Super Soldier Company world has begun.

You can skip ahead directly. The protagonist is invincible, so it won't affect anything.