For this BL plot's convenience, old man Joseph Joestar was sent back 50 years into the past by an enemy Stand.

Yaah, sorry about this.

Looks like I'm crashing here until the effects wear off and I can head back!

Nice to meet you~!

Ohhh Nooo!

This bag of bones is me 50 years from now!?

You gotta be kidding me! He's just a withered old man!

I planned to be a smoking-hot man in the future!

I'm not gonna be this fucking geezer!

Hmm, I was quite the rude one.

What are you saying, JoJo?