Twenty-third fic for a Pride Month prompt challenge from tumblr. Prompt: anniversary.

Without Kunikida around to bother – really, it's very inconsiderate for him to have gone out with Ranpo to look into the corporate espionage they had been landed with! – and everyone else either busy or also out, Dazai is bored. Even Atsushi is nowhere to be found: when Dazai sent him a message, Atsushi sent back a vague response and then never replied to the other messages Dazai left. Eventually, Dazai had to pout and put his phone aside, resigned to not getting any messages from Atsushi.

Alone in the main office, he's already done a thousand spins on his office chair (and then nearly fallen off it as a result), re-arranged Yosano's desk (and then put it back for fear of retribution) and watered Kenji's plants (and then mopped up the overflowed water). He's lying on the sofa contemplating trying some of the plant food on Kenji's desk (after looking up how much a lethal dose might be) when he hears the door open and a familiar gait on the tiled floor.

"Hello?" Atsushi calls, and Dazai can hear the rustle of a plastic bag in Atsushi's arms and then a slightly heavy plonk as he puts something down on his desk. "Dazai?"

Dazai smiles a little at the sound of his name in Atsushi's mouth and sits up a little, popping his head over the back of the sofa. "Hi."

Atsushi looks over with a bright smile and scurries over with a plastic bag. "Hey, I got you a present!" he says as he sits down beside Dazai, who soon feels a strange sloshing feeling in his lap as Atsushi puts down the bag.

He looks down in surprise and picks up the bag, holding it up to see a little goldfish swimming about inside. Dazai's mouth drops open in surprise and delight.

"I got it in town," says Atsushi. "I thought it might be nice to have on your desk here."

Dazai nods, face breaking into a smile. "Thank you! I love it... What do I do with it?"

Atsushi laughs. "You put it in a bowl. With water. And try not to kill it."

Dazai nods again. "Okay..." He watches the fish swimming around in the bag for a little longer before asking, "What's this in aid of?"

"Hmm?" asks Atsushi, but there's a little pink flush creeping up his neck. "What do you mean?"

"It's not my birthday," says Dazai. "Or Christmas or... anything, really."

Atsushi blushes a little more. "Oh, I thought you might remember. It's... well, it's a year since we met."

Dazai's eyes grow wide. "Is it?"

Atsushi nods. "Yeah... it's been a year since I dragged you out of the river."

"Wow!" Dazai grins. "Thank you!" He pauses and then his face drops. "But I didn't get you anything."

Atsushi smiles. "No need. You gave me the last year."

They stare at one another in silence for a long moment before Dazai's eyes grow wide.

"You soppy thing," he says, before putting an arm around Atsushi's shoulders and pulling him in for a tender kiss.