You were on the deck of the Sunny, while everyone hung out on the beach of the island you docked on. You went commando, only wearing your short sundress.

Usopp was just waking up from a midday nap, when he walked up the stairs: only to see your bare ass from under the dress.

He completely stopped walking, his breath hitching as he saw his lover in such.. a lewd state. He quickly ran up the stairs a short moment after.

"Hey- what the hell do you think your doing? What if someone.. sees your-??" He frowned and quickly stood behind you, almost to protect you from anyone else's eyes.