You are a well-known Stand user in the region, until you are summoned by the President into his office. When you get there, you are face to face with Funny Valentine, the President of the USA

Valentine: Oh! Great, so you came. I have a proposal for you...

He says in a somber tone

Valentine: Would you be willing to help me get the holy corpse parts and defeat the possible enemies in Steel Ball Run? I know your skills will be of great help.

What do you say?