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Sanji gasped as Zoro moved his tongue just right, hitting that spot that made him see stars. He resisted the urge to call out Zoro's name, instead gripping the counter beneath him until his knuckles turned white. He bit his lip so hard it bled, trying to keep from making pathetic noises, or letting something slip that he couldn't take back.
Zoro noticed, and lifted his head enough to look Sanji in the eye, take his hand, and plant it firmly on his head. An indication to take control, to direct Zoro where he wanted him.
Gods. Sanji wouldn't be able to hold on much longer, not with that pleading look in Zoro's eyes, urging him to let out those pent up, desperate noises.
But Sanji held his tongue.
They agreed this would be casual.
Now Zoro was eating him out on the kitchen counter, and Sanji was going to kick his head in if he didn't thoroughly disinfect every surface in here.
But not before he got him off again.
---
It had started over two years ago, just after Alabasta.
Vivi's absence left a hole in the crew's dynamic. Everyone was on edge, having witnessed Luffy's close brush with death fighting Crocodile.
Sanji in particular had been feeling jumpy and anxious. Zoro approached him one evening, an uncharacteristic blush across his cheeks. He offered to help Sanji let off some steam.
Sanji was hesitant to agree at first. He'd been attracted to the mossball since the beginning, but never thought anything could come of it.
Hell, the first time he'd even fooled around with anyone was with Ace, as they were hiking to Yuba. Ace had clocked Sanji right away, and Sanji had let him suck his soul out through his dick.
That was the first time he'd had sex.
And now Zoro was offering to get him off, no strings attached, whenever one of them got pent up.
Sanji agreed.
Zoro had fucked him that night up in the crow's nest, amid the chilly ocean breeze. He'd stretched him out slow and gentle, coaxing him through it with placating words. He kissed him. Told him he was doing good, then cleaned him up after. His actions held none of their usual aggressiveness, none of their bickering or fighting.
The next morning, it was as if it never happened. Zoro didn't mention it, so neither did Sanji, too afraid of the feelings their night of passion had stirred in his chest.
Until it happened again.
---
They were docked at a little summer island. The crew was gathered in a bar, celebrating their latest marine victory. The air was humid and stale, the lingering heat of the summer day making the bar feel hot and cramped.
But they didn't care. They still laughed and joked, drinking until they were flushed red and damp with sweat.
No one noticed Zoro and Sanji had been missing for most of the night.
Zoro had dragged Sanji to the bathroom, pushed him up against the stall and kissed him like he meant to devour him. Then he'd barred the door, lifted him up, and fucked him stupid, until other patrons were banging on the door for them to hurry up.
Zoro banged back, telling them to fuck off.
When they finally opened the door, the first man to barge in made some comment, “honeymoon phase?”
Zoro cleared up, “we're not together.”
Sanji just bit his tongue.
---
And it just kept happening. After every battle, every time they came just a little too close to losing, they'd find each other.
Sometimes, Zoro would want Sanji to pin him down, be rough, use him until neither of them could move. Others, it was Sanji beneath him, tied up with his own necktie, as Zoro brought him to the edge over and over.
The best times were when Zoro was gentle. He'd brush Sanji's hair out of his face, kiss his eyebrows, and take him slowly. He loved when Zoro would tell him he was good. That he could do this; he could be enough for Zoro. It made him worth something.
But when it was over, it was back to their usual fighting. Like Sanji was nothing more than a guy he banged in the closet.
---
Sanji had plenty of time to think over the two years they were separated. Ivankov had weaseled all of Sanji's secrets out of him, taking a particular interest in his supposed ‘no strings attached’ fling. And they’d immediately figured out Sanji wanted more.
Sanji had known for a while that it wasn't casual to him, but would never let that unhygienic gorilla know that. If he was completely honest, he'd probably known since that very first time in the crow's nest. He’d decided then that he’d take whatever Zoro would give him, even if he wanted一 needed一 more.
He couldn't help the delusions; dreaming of him and Zoro sharing the spare room on the Sunny. The crew knowing and accepting them. Kissing Zoro while he waited for the coffee to brew in the morning.
And he knew that Zoro didn’t feel the same. He’d seen him at bars sometimes, letting random men lead him away.
But still. It was better than nothing at all.
---
When they were reunited, Sanji promised himself he’d suppress these feelings. He was always a romantic, falling in love with anyone who so much as smiled at him. Zoro hadn’t even done that, and Sanji was head over heels.
And Sanji had tried, okay? When he saw Zoro come out of the water after splitting that ship in half, he’d controlled himself. Until they fell into their usual insults and bickering, and Zoro dragged him to an alley to fuck his brains out, making up for the lost time.
When they were finally back on the Sunny, Sanji got to work reorganizing his things, making space for the new clothes the ladies on Kamabakka had gifted him.
He sorted through his suits, making sure they’d all still fit. But.. some of his things were missing?
He opened the other lockers, assuming something was misplaced. And found his clothes in Zoro’s locker. His favorite tie. The sweater he always wore when he was stuck in the infirmary.
That stupid bra Zoro had made him wear one time.
---
Sanji was in the galley prepping dinner when the snail rang, and Perona answered. She ranted to him about how that “uncute muscle-brained freak” never answered her calls or letters. Sanji assured her that it was simply a result of Zoro’s stupidity, and the loss of brain cells resulting from the chronic moss infestation, and not him purposefully ignoring her. She’d calmed down after that, instead telling Sanji all about the shenanigans Zoro had gotten up to while they were separated.
It only made him pine for Zoro and his unique brand of stupidity more.
---
He finally slipped one day after another big battle. Zoro had been roughed up pretty badly, and Sanji couldn’t seem to pull himself away from his bedside.
When he woke up, Zoro had comforted him, like he was the one who almost had his guts ripped out. The way he held his hand was so tender, it felt like his chest would split open.
He felt like crying. He hated that he'd let this drag on so long.
“I can’t do casual anymore,” Sanji blurted out.
Zoro looked hurt for just a second, quickly wiping the look off his face and going for something neutral. But not quick enough that Sanji couldn’t catch it.
“Why? You find some hot chick to propose to?” Zoro asked, clearly going for teasing, but Sanji still caught the slight waver in his voice.
“No. There’s no one else. I just.. I can’t keep this up. I can’t keep pretending this is enough for me. To be so close to you, then have you leave in the morning. To see you leave with another man, then come right back to me like nothing happened.”
Sanji shut his mouth, pulling at his hair. How stupid could he be? Why did he say that? Zoro was going to hate him, they wouldn’t be able to keep fighting together, to work as crewmates and Sanji would have to leave the crew-
“Curls!”
Sanji was pulled out of his spiral by Zoro taking his hands, gently tugging them out of his hair.
“We’re both kind of dense, aren’t we?” Zoro asked softly.
“..what?”
“I’ve been in love with you since you beat up a fishman underwater,” Zoro said sheepishly, stroking a thumb over Sanji’s hands. “I didn’t want to scare you away. Figured casual would be easier for you to handle. Pretended to hook up with other guys every now and then, keep up the act.”
“Oh. I- I think I’ve loved you since you nearly got eviscerated on my doorstep,” Sanji teased back. “Gods… we’re both a couple of dumbasses,” he said, leaning in to kiss Zoro.
------------------------------------------------
Epilogue
A few days later, they informed the crew over breakfast, Zoro draping an arm around Sanji possessively.
The crew seemed unphased. In fact, Nami began collecting winnings from Usopp and Franky (the others were smart enough to know never to bet with Nami).
“We’ve known for a while. You guys aren’t exactly quiet,” Nami said.
Before Sanji could have an aneurysm over the whole crew having heard them fucking, Luffy speaks up.
“Wait, so Sanji’s bisexual? I thought he was French?”
The only thing stopping Sanji from kicking Luffy overboard was Zoro, tugging him into another kiss.