Even

As always, Zoro was enjoying his cat naps on the Thousand Sunny's deck. He was leaning up against the rails with light snores escaping his lips.
"Hey, Sanji, have you seen Zoro?" Usopp asked.
"Like it's hard to find that lazy-ass," Sanji replied. "He's sleeping, like that's a shock!"
"Oh, well I'll just talk to him later," Usopp said, turning back. As he did, Sanji did a quick double take. There was something in his pocket.
"Hmm..." Sanji hummed. "Usopp, lemme borrow that marker."

Sanji waited a little while to do what he planned. Finally, he managed to sneak across the deck to the sleeping swordsman, marker in hand.
Somehow, Sanji wrote on the typically tan face of the marimo. When he was done, he darted away and searched for Usopp, Chopper... anyone really.

Zoro started to wake from his nap to the sound of laughing. He opened his eyes and looked to the right. Chopper, Usopp and Sanji were there, laughing hysterically.
"What the Hell's your problem, guys?" he called out. This only seemed to make them laugh more.
Then Zoro saw that Sanji was holding a black marker.
Without a word, he jumped up and ran to a mirror in the bathroom on the ship. He saw a triangle on his nose, resembling a cat's nose. It matched the curly whisker-like mustache that was on his lip. Not to mention the large "L" on his forehead.
Grunting his displeasure, Zoro flung the door open to go unleash his anger on the ero-cook, but almost hit someone that was standing outside the door.
Luffy had a giant smile, as always, and was holding a marker. He had a matching mustache and nose. And a letter on his forehead.
"Luffy?" Zoro said, taking in his friend's appearance.
"See? Now you're not all alone!" Luffy smiled.
Zoro paused. "Then why do you have a "Z" on your face?"
"Well, you have an 'L,' right? L is for Luffy, Z is for Zoro, silly!"

Zoro and Luffy had a hard time restraining their laughter as they scribbled the picture of a cat. Right in the smack-center of that stupid cook's kitchen floor.
Payback is sweet.

"Damn, stupid, immature..." Sanji growled, his list going on and on as he scrubbed the black marker from his floorboards.
"You know, it's only fair," Chopper teased as he walked by.