Just want to clarify here that I'm using feminine pronouns for Luffy just because of the body changing.
The crew burst into the infirmary among the harmony of screams, demanding to know what the hell was wrong, was anyone hurt . . . the usual questions.
They stopped short when they saw Luffy's changed figure. At this point the screams had died down and Luffy was staring at her body in great confusion while Chopper panicked.
"So . . . these are boobs, aren't they?" Luffy said bluntly, groping her chest. "Yeah, these are boobs. Why do I have boobs?"
"Why are you a girl?" Nami demanded.
"I'm not a girl!" Luffy protested. She unzipped her pants, looked inside, and screamed again.
"Cover up, for god's sake!" Zoro yelled, covering his eyes. Luffy zipped her pants back up.
"This is a dream, this is a dream," Sanji muttered to himself, determinedly looking away from Luffy. "I'm going to wake up any second."
Robin pinched his cheek. "Stop that," she scolded.
"Guys, get out," Chopper ordered. "I need to—I need to examine Luffy. This is a drastic change. I don't know if there are any negative side effects. Besides, it's too small in here for all of you!"
"Fair point," Franky said. "Alright, you and Luffy-sis have fun."
"Sis?" Luffy muttered indignantly as the crew backed out and shut the door. She turned to Chopper. "What's going on? Where are my family jewels? Why do I look like a girl?"
"I don't know," Chopper admitted nervously. "Luffy, can you sit still for a bit? I need to give you a checkup."
"I feel fine, though," Luffy said, settling back on the bed. "My stomach doesn't even hurt anymore."
"Still," Chopper insisted, and Luffy pouted but listened.
Chopper and Luffy came in for breakfast after a while. Luffy immediately fell upon the food, ignoring the stares of the others.
"Luffy's okay," Chopper announced. "It's only the body that's changed."
"Uh . . . great," Zoro said. "So . . . how do we reverse this?"
"Reverse?" Luffy said curiously. "Like turn back to a man body?"
"Yes, Luffy," Nami said exasperatedly.
"Why?"
"Why?—Don't you want to be a man again?!" Usopp demanded incredulously.
Luffy frowned. "Just 'cause my body's different doesn't mean I'm not a man." She took another huge bite of food. "Anyway, I don't think my strength's any different, and I can still be the Pirate King without my family jewels."
"True," Franky said thoughtfully.
"And besides, I'm not sure how to reverse it," Chopper admitted quietly. "It might have been caused by—Luffy, you said it was a fruit?"
"Yeah."
"Luffy ate a fruit yesterday, and said it was the only one," Chopper explained. "If it was caused by that, there aren't any samples to test."
"You know, this is why we tell you not to eat strange things," Robin remarked.
Luffy shrugged and glanced at Sanji and Brook. "Sanji, Brook, you guys doing okay? You haven't said anything for a while."
"Luffy," Sanji said quietly, obviously through gritted teeth even as he kept his back to her. "If you keep talking to me in—that voice, I won't be able to keep a grip."
"What voice?" Luffy asked in her new girlier voice.
Sanji almost dropped the towel he held.
"Say, Luffy-san," Brook said, "may I see your panties?"
Luffy looked at Brook strangely. "Brook, I don't wear underwear . . ."
Sanji collapsed behind the counter. The others ignored him.
"Are you going to start wearing panties?" Brook asked eagerly.
". . . No."
"Oh yes, you are," Nami snapped. "Have some feminine decency."
"Why do I need 'feminine decency?'" Luffy asked indignantly.
"With that body, you do!"
"Do not!"
"You do too! You can borrow some of my panties—at a price—if you must, but you're going to wear some!"
Behind the kitchen counter there was the tiniest of spurts as Sanji's nosebleed finally burst out.
"Can't make me," Luffy muttered.
"Watch me," Nami snarled. "Robin, don't you agree?"
"I think it's up to our captain to decide," Robin said. "If Luffy hardly wore underwear before, I don't see any reason to start now."
"Robin," Nami moaned, "how could you . . ."
"Thanks, Robin," Luffy said gratefully. "Hey, Sanji, are you okay?"
Sanji was still behind the counter. They spotted some blood trickling out across the floor.
"Didn't know you were so weak-willed, cook," Zoro remarked.
Instantly Sanji shot up like a rocket from the floor. He seized a damp towel, mopped the blood off his face, threw it the ground, and shouted, "What did you say about my will, you damn moss?!"
"Oh, you're up," Luffy said cheerfully. "Sanji, can I have some more food?"
Sanji turned to Luffy, ready to give the automatic "Wait for the others to finish," but then his eyes fell upon Luffy's longer hair, very exposed chest (since the cardigan had been left open), narrower waist, and a bright smile aimed at him.
And he broke.
"Of course, anything for you, Luffy-chan," he cried, his eyes filling with hearts as he immediately seized more food and placed it in front of Luffy.
Luffy was very startled, but shrugged. "Cool! You're the best!"
As she started shoveling food in her mouth, Sanji stifled another nosebleed. "She called me the best . . . we are meant to be . . . but how can I choose among three lovely ladies?!"
"Wha?" Luffy mumbled around the food.
"Simple: You don't," Nami snapped.
"Like I said," Zoro muttered. "Weak-willed."
"Loving ladies is manly, I'll have you know," Sanji hissed.
"Luffy's . . . not a lady," Usopp pointed out. Luffy nodded in firm agreement.
"I don't care what you call yourself, you have to cover up," Nami snapped. "For goodness' sake, you're practically topless!"
"Look who's talking!" Luffy exclaimed, pointing out the navigator's skimpy top.
"At least it covers my breasts!"
"So does my shirt!"
"Not nearly well enough!"
"Looks just fine to me," Sanji declared, staring openly.
"Why do I have to cover up?!" Luffy protested.
"I won't have you being indecent!" Nami exclaimed.
"I'm decent!"
"You are not!"
Luffy stood. "Thanks for breakfast, I'm out of here," she said quickly. "Usopp, let's go fishing or something!"
"Right behind you," Usopp said, looking at Nami's murderous glare nervously.
"She thanked me," Sanji whispered.
Luffy breathed a sigh of relief as she and Usopp cast their lines into the sea.
"At least you're not bugging me," she muttered. "Thanks."
Usopp shrugged. "Well, boobs are nice, but I'm no pervert like Sanji."
"Not just that," she said with a pout. "Nami and Brook are being weird, too. I don't like it."
"Hey, cheer up," Usopp said, nudging her. "Let's try to catch a Sea King!"
Luffy started to drool at the thought of so much meat. "Yeah!"
Throughout the day, Luffy was harassed by Brook's constant request to see her non-existent underwear, despite her reminders that she wore none. This changed shortly after lunch, when Nami dragged her captain into the women's quarters amid protests, and brought Luffy back out, now with a red tube top shirt and, according to complaints, panties.
"So may I see them now?" Brook asked politely. Luffy frowned and shuffled away.
"Usopp, Chopper, help," she groaned, falling dramatically onto the lawn next to them. "Nami made me wear this stuff . . ."
"You look good in it," Usopp said helpfully.
"That's not the point . . ." Luffy said indignantly. "The underwear's tight."
"So take it off," Usopp said.
Luffy began removing her pants.
"NOT HERE!"
At dinnertime, Luffy cleared her throat loudly, and everyone fell silent and waited for whatever announcement was to come.
"I changed my mind," she said. "I wanna change back."
"Why'd you change your mind?" Franky asked.
"Because I don't like that you guys are treating me differently," she said, looking pointedly at Sanji, Brook, and Nami with a frown. "So I wanna change back."
"That sounds like their problem, but it's up to you," Zoro said.
"Look, I'm just saying, with that body, you need to cover up," Nami said impatiently, a bit flushed with embarrassment.
"My question is usually more of a habit than anything," Brook remarked, "but I wouldn't have minded seeing them in the least."
"Please change back immediately," Sanji said, turning away to avoid looking at Luffy. "My mind can't deal with this."
Luffy nodded firmly. "We'll get to work on it tomorrow."
"Speaking of which . . . where're you gonna sleep?" Franky asked.