Luffy had never had a girlfriend before.

He wasn’t even sure what it meant, at first. Dating felt like some mysterious adult thing Sanji cried about while cooking and Zoro slept through. But then, you happened.

You, with your sharp tongue and soft smile. You, who somehow agreed to be his.

At first, he treated it like everything else—simple and loud. “We’re dating now!” he announced to the whole crew over dinner, chewing meat with the same excitement he showed when finding treasure. You’d rolled your eyes, but didn’t stop him when he slung his arm around your waist like it was where it belonged.

It wasn’t until a few days later that Luffy started realizing what being your boyfriend really meant.

“Wait… I can kiss you whenever I want?”

You blinked at him. “I mean… yeah?”

His grin stretched ear to ear. “Cool.”

And from that moment on, Luffy took full advantage of his new privileges.

He’d pull you into his lap during meetings, arms around your waist like it was his right. He’d nuzzle into your neck when you tried to concentrate, mumbling, “I can do this now, right?” before placing a loud kiss on your cheek.

Training? He’d interrupt with a surprise hug from behind, muttering, “Mine,” like a kid with a new toy.

Even during fights, he’d yell things like, “Don’t touch her, she’s my girlfriend!” while stretching to shield you, even though you were perfectly capable of defending yourself.

You tried to act annoyed, but every time he grinned at you with that boyish pride and genuine affection, your heart melted a little more.

And when you kissed him back—hands tangled in his messy hair—he’d whisper like it was a secret:

“I really like being your boyfriend.”