He tries to get them naked.

Sora, unbeknownst to his friends, had a bit of a CMNF fetish, so, while the idea of forcing his female friends to follow arbitrary rules felt a bit wrong to him, he nonetheless had a reasonably good idea of what he wanted from them.

"Okay, so for the Island Rule, neither of you are allowed to wear clothes!"

"veto""veto"

Sora's face fell before the girls explained why.

"Sorry, that's just a bit too much for only one rule." Kairi explained while Sora could swear that her blush was actually GLOWING. "But you can take half our clothes for 1 Island Rule. Do you wanna do that?"

Sora nodded with a bit of a perverted grin on his face.

"Okay, so how do you want it then?"

"Okay then, while on the island you two can't wear...