Kim undressed herself
From Create Your Own Story
Noticing Kim's hesitation, you decide to try and talk her into getting naked with you. After all, if nudity was this much fun on your own, how much more fun would it be with two people?
"C'mon! You have no idea how much fun it is to be naked. Everything is so much more exciting!"
Kim still looks somewhat unsure, so you decide to compromise.
"If you get naked with me, I'll go to school with you!"
You know this will convince her. Neither you nor Kim have many friends apart from each other, so you spend every free moment you have at school together. You know Kim would be pretty lonely at school without you there, but she also puts a lot of pride in her grades, and is understandably reluctant to skip school entirely.
The moment seems to drag on forever, but Kim finally makes up her mind.
"In that case... alright"
As she says this, Kim pulls her white dress up over her head and throws it off, revealing a fair bit more than you expected. You have to say, you had not pegged Kim for the type to not wear panties. Before you can dwell on this, Kim interrupts your train of thought.
"Okay, now let's go!"
You adopt a look of confusion.
"Go where?"