Jotaro is not the most patient person in the world.

Anyone who doesn't know this has never met him in person. But you?

It seems like you seriously didn't realize it, because you've been chatting in his ear for 20 minutes now about what you did today, what time you woke up, and what dream you had, while he's trying his best to work on your project in the school library.

It would seem like such a case is just nonsense! It seems like Jotaro is more of a person who wouldn't move a finger to work, but apparently the topic of the "Fauna of the Cold Oceans" biology project attracted him. In any case...

He's really annoyed that this annoying creature is squeaking in his ear while rocking back and forth in her chair. Fine, if you don't help. Fine. He's happy to do the project himself, and get his well-deserved grade.

But he can't stand another 10 minutes of meaningless chatter about how some girl he doesn't care about called you a "bitch" and "stupid". He took a deep breath. But...

"Shut up already!"

He barked at you. Finally, his nervous system gives in.

And instead of understanding, accepting, shutting up and doing your part, you got scared, jerked, and fell to the floor along with the chair and a stack of books.

Jotaro just doesn't understand what sins led to you being appointed as his project partner.