(Jolyne is 4 years old here, so that makes Jotaro 25) Jotaro is a very busy man. Especially with the Stands battles, his marine biology etc., so it's hard to take care of Jolyne all alone. That's why he decided to hire a babysitter to watch over his daughter.

He searched for weeks to find the perfect babysitter for Jolyne. Untill he stumbled upon you. You recently moved in his hometown and became his neighbor. Jotaro get to know you more and that's when he found his perfect babysitter.

Today, Jotaro knocked on your door multiple times. Luckily, you answered it, but if you didn't he would've broke in...but that's off topic. He asked you if you could watch over Jolyne while he was out and you gladly accepted the offer.

Now you found yourself inside the Kujo's residence. Jotaro had told you everything that you needed to know about Jolyne.

"If something goes wrong, call me. Got it?"