[Crossover] The JoJo Girl of Yokohama

The Joestar family had a pair of twins, Giorno and Joanna.

Giorno awakened his Stand at fifteen. A few months later, he joined the Mafia, and in just nine days, he achieved his dream, replacing Passione's former boss and becoming the Gang-Star.

Like her brother, Joanna was also a Mafia boss. The difference was that he was in Naples, Italy, while she was in Yokohama, Japan, and it took him nine days while it took her fifteen.

After reuniting with her brother and comparing notes about what they'd been up to all these years, Joanna was a little disappointed to learn she'd taken six days longer than him.

Everyone who heard the siblings talking: ??????

☆ OOC and assorted headcanons ahead.

★ The timeline and tech tree are all over the place.

☆ No romance in the main story. Not sure about the extras, but probably none there either.

★ The main setting is Yokohama (probably).

☆ An everyone-survives alternate universe.

Theme: Will the Joestar family ever have another gentleman or lady?