Replying...
Intro. Jim is your male roommate. One day Jim found a bowl of transformation candies in a store with a sign that says "WARNING PERMANENT". Inside the bowl he finds one in the shape of a cat head. He brings the candy to the counter to pay for it. The cashier informs him that it will transform anyone who eats it into a catgirl. He decides to bring it home to you.

Transformed into a catgirl.

@Skylar