Author's Notes: This was supposed to be for that "three sentence prompt" on tumblr, but I immediately said screw it and decided to make it more. I'm tempted to write the actual night of as well. This was too fun! Now it's going to be a little series told from multiple POVs and then the "night of" flashback fic at the end.

Disclaimer: I own diddly-squat.


Customs
(cassian)


Cassian woke up to a pounding headache, the irritating feeling of sand lodged in every crevice of his being, and a heavy weight on top of him. When he lifted his head, he saw a few confusing things: the remains of what looked like had once been a bonfire, most of his crew and the aliens they were attempting to negotiate with sprawled on the breach looking how he felt, and most importantly, Jyn lying partially on him, her hair out of its typical fashion and a wild mess, and wearing a shredded white dress. Where had that even come from? Why was she wearing it? And why was she sleeping on him in front of everyone? Hell, why were they all passed out on the beach?

Carefully, so as to not disturb her and to keep his head from rocking, Cassian detangled himself and slid out from underneath her. Pulling his jacket off, he bunched it up and pushed it to Jyn until she took it to use as a pillow, mumbling something (that sounded an awful lot like his name) under her breath. Rubbing at his bleary eyes, Cassian stumbled around the passed out bodies and tried to take in the scene, but he didn't understand any of it.

Only bits and pieces of the night flooded his mind: the leader of this group of aliens insisting on their glasses being refilled after every decision made, people and aliens dancing and singing (had Bodhi been singing?), a fire so bright and large in his memory that it made him blink now and his head ache, Jyn taking his hands and pulling him into the crowd, her teasing laughter, her daring smile, the three little moons shining all around her as she splashed about in ankle-deep water. He needed to radio K-2 back at the ship, but he hadn't any ideas about what he would say.

"Ah, I knew you would be the first to wake!" a familiar voice called out much too around, Cassian found Chirrut standing in the ocean, the alien planet's strangely warm water lapping at his bare feet. His back was to Cassian, but it didn't seem to matter. Cassian made his way towards him, but kept out of the water. Somehow, he'd managed to keep his boots on whereas everyone else seemed to have lost them during the night. "Baze is such a late and heavy sleeper. It'll be troublesome convincing him to rise after last night."

"What happened?" Cassian asked, his voice hoarse from having just woken up. He ran his fingers through his hair, but the memories didn't full return. "I do not remember everything. Whatever was in those drinks was strong. I should not have agreed to having one after every single settlement."

"It was a part of custom," Chirrut pointed out, "and you did not want to insult them."

That sounded like him. He'd chew on a hard rock if it meant a mission succeeding. Apparently that went with drinking as well. "Yes, well, I should not have continued drinking after the talks were done. What were we thinking?"

"We were rejoicing," Chirrut told him. "We were celebrating."

Cassian furrowed his brow. "Celebrating what? Their agreement to allow us to build a small rebel base on their planet?"

Chirrut lifted his face to the sky, the blue sun glowing brightly in his cloudy eyes, and replied with a very cheeky grin on his face, "Your union."

"My what?" Cassian stared blankly at Chirrut, but the blind monk offered no more wisdom. His…union? He didn't understand what Chirrut meant. It didn't make any sense. "What…?"

He turned back around to examine the scene and his eyes locked onto Jyn, her arms wrapped protectively around his jacket where his body had been moments ago. He thought of… Him tucking a strand of her hair behind her ear, an assortment of strange alien flowers making a crown on her head, her body snug and warm against his as aliens sang and danced circles around them, tugging on her hand as they jumped over a smaller fire and laughing when they bumped into each other, pulling her behind a hut to greedily kiss her lips and drag the already torn skirt of her dress up–

Cassian pressed a hand against his head and felt something unusual against it, something hard and cold. When he glanced down, he saw what it was and his heart about stopped: a rather crude, but mostly smooth dark metal band around one of his fingers. His ring finger.

"Congratulations on your marriage, Captain," Chirrut said with barely contained laughter. Despite his obvious amusement, there was a very pleased expression on his face as well, as if he was genuinely happy about the situation. "Technically speaking, you and Jyn married under this planet's customs. I am not sure how that will extend throughout the galaxy as they do not have a legal system here, but I suppose we will find out."

Jyn was going to murder him. She was going to come to, find herself in a dress of all things, notice the ring on her finger, and put two-and-two together. She would find the blaster that must be with the rest of her clothes and she was going to shoot him. Because somehow or another, they had all gotten drunk while on a mission and he'd convinced her to marry him. He knew without remembering that he had done it – that he had been the one to ask – because he could hear the end of this galactic war ticking inside of his mind and he was afraid of an outcome that didn't involve him finally being an honest man.

"Your bride is waking, I believe," Chirrut said, bringing Cassian out of his thoughts. "It would be a shame for her to wake up alone on the morning of her first day as a married woman."

My god, my wife, Cassian thought as he watched Jyn beginning to stir in true. She looked absolutely lovely in that dress with her wild hair and blinking eyes and his heart betrayed him with a painful thump where his mind once would've fought fiercely against it. She connected eyes with him, her brow furrowed in the confusion that he had felt shortly before, and he found himself walking to her with nothing to say and everything on his mind.

This was going to be a very rough morning, hangover notwithstanding. K-2 was never going to let him hear the end of this.