#with as much lactose in all at once as you'd usually consume over a couple of weeks

[hebrideansky]

painful death to all people who secretly feed you a lot of milk hidden in artichoke soup

[hanemiso]

Operation: Dairy For Dazai

>>>a dazai osamu x reader<<<

request: "omg i love your post about Dazai and his possibility of having lactose intolerance hahaha, i wish you could do a fanfic out from that"

a/n: um this is such a great idea??? this was so much fun to write omg i hope y'all like it! also i know dazai doesn't necessarily drink coffee with milk and sugar/creamer, but for the sake of the story he does! also sorry if the gif looks weird, i couldn't find his weird little run anywhere else.

synopsis: no one has seen dazai drink milk or consume dairy of any kind...it's up to the agency to figure out if dazai is lactose intoleralnt or not!

warnings: one swear word, dazai not being able to handle dairy

"hey atsushi, you ever notice that dazai doesn't consume dairy?"

"what do you mean, y/n?" atsushi asks, glancing up at you from the computer.

"think about it. have you ever seen dazai drink milk? eat cheese? buy ice cream?" you press on, raising your brows.

atsushi takes a second to think before responding with, "now that you mention it, no i haven't...why are you asking anyway?"

"i think dazai is lactose intolerant."

you now have atsushi's full attention as he rolls closer to your desk and furrows his brows. he looks around the room for the brunette you're talking about before turning back to you, "you think so? i don't know...maybe it's like a dietary thing."

you deadpan, "you really think the man who goes out of his way to try new attempts at committing suicide--the one who came into the office with a hallucinogenic mushroom from a random mountain--is concerned with his own nutrition?"

atsushi goes silent and nods his head in agreement.

"come on, atsushi. i mean, why would that be the one thing out of his entire diet that he'd choose to cut out?"

"that's true, i've seen the kinds of things he eats...but why is this something you're interested in?"

"because, atsushi, the thought of THE dazai osamu even having one slight weakness--and the fact that it very well may be dairy, of all things-- is amusing. you don't find it interesting? that he can survive things like bullet wounds and getting kidnapped without any problem, but a glass of milk could completely ruin him?"

atsushi was beginning to take interest in what you were talking about. you had a point, he couldn't deny that. they don't know much about dazai and his life as it is. just as it began clicking in his brain, kunikida walks over to your desk to tell you both to get back to work. at the sound of his footsteps, you turn towards him and before he can say anything at all, you ask him the same question as atsushi. kunikida has a smiliar reaction and response to atsushi, which just adds to the curiosity of dazai's possible dairy problem.

"i don't pay attention to that idiot's diet anyway, nor do i care." he says matter-of-factly.

anyone could tell that kunikida was slightly interested, just by the way he was continuing to linger by your desk as you continued talking about it with atsushi. soon enough, tanizaki had joined the conversation; then ranpo and kenji, and soon everyone in the agency other than fukuzawa. everyone was huddled around your desk, sharing memories of dazai's lack of dairy consumption. it was then decided that this theory of dazai being lactose intolerant would be put to the test when dazai returned to the office.

ranpo had come up with the idea, it wasn't too elaborate but a simple plan that could trick even the likes of dazai into drinking a glass of milk. during the discussion of dazai's dietary habits, it was also brought to everyone's attention by kunikida that it seems dazai doesn't have a high spice tolerance either. with that in mind, the plan was for the agency to have a joint dinner tonight, with curry on the menu tonight; spicy curry to be exact. dazai always flirts with you in the office, so it was your job to distract him by indulging in his pick-up lines and such. once he takes a bite and realizes it's too spicy for him, he'd try to find water to alleviate the pain, but coincidentally there is no water in sight. because of this, he'd be forced to drink the glass of milk you hand him. of course, if this didn't work, for dessert you'd give him a cup of coffee with milk and sugar (he uses non-dairy creamer in his coffee anyway).

you and kyouka set up a table to put the bowls of curry on, while atsushi and kunikida began bringing in the curry. tanizaki, naomi, and ranpo were in charge of getting the desserts to really sell the image of a nice gathering. kenji and yosano were in charge of tinkering with the water pipes to close off any possibility of access to water. this task was treated with such care, as any mission brought into the agency would be. each and every one of you were interested in learning about this side of dazai; are you going the extra mile for such a minuscule detail of someone's life? yes, but will it be amusing to find out the truth? also yes.

soon enough, dazai is spotted out the window. the truth is about to be revealed, and you are all nervous but excited.

"remember guys, act natural! operation: dairy for dazai starts now!" you exclaim quietly.

you can hear everyone take a deep breath and begin "talking" amongst themselves as dazai walks in. he stops in his tracks as he eyes the table holding all the bowls of curry and widens his eyes in surprise.

"oh? what's this?" he asks, gesturing to the table.

"y/n suggested having dinner in the agency tonight, so we got some curry and desserts." atsushi explains.

"have a bowl, dazai-kun." you smile at him as you hand him the bowl of spicy curry.

"ah, you're too nice, my belladonna!" he exclaims and grabs the bowl.

so far so good, you think.

you can feel the tension in the room as everyone waits for dazai to take a bite. the conversations carry on amongst people, but no one was truly paying attention to what was being said. the gazes of each member of the agency shifted to dazai as he raised the spoon up to his mouth. you could hear the sound of everyone in the room holding their breaths, even kunikida was sweating.

once the spoon had been placed in his mouth, everyone froze in place. you and atsushi tried to pretend to not be paying much attention to dazai, but it was so hard not to when all of a sudden he stopped chewing. you both slowly turn your head towards him and see his eyes go wide once again. he hurries to the nearest trashcan and spits out the spoonful, quickly turning and looking for a cup of water on the table.

"w-what's wrong, dazai-san?" atsushi asks, also sweating.

"h-hot! spicy curry! atsushi-kun, i need water! please!" dazai exclaims.

you run to the table and pretend to look for a cup of water before grabbing the glass of milk and hurrying towards dazai.

"sorry dazai-kun, i couldn't find any water, but i heard milk helps with the pain!" you hold out the glass of milk.

it feels like time stops as dazai sits there, breathing shallows breaths in attempts to stop the fire in his mouth, and contemplating whether he wants to try his luck with continuing to gasp for air or drinking the milk. he hates suffering, after all. in his mind, all that matters at this moment is extinguishing the flames dancing on his tongue. he grabs the glass, just as planned, and drinks a couple big gulps. everyone is now turned to him, asking if he's okay.

"i'm...fine." he says between pants.

now it was only a matter of time. the dinner continued as normal, but dazai wasn't as social as usual. he sat down with you and atsushi as you continued to talk about different missions.

"oh yeah, dazai-kun, do you remember--" you turn to look at him but realize he's staring at the ground intently as sweat beads on his face, "dazai?"

he blinks once and tries regaining his composure as he looks up at you with his usual smile, "yes, belladonna?"

"are you feeling alright?" you ask with concern laced in your voice.

"of course i am!" dazai tries to reply cheerily, but his bright tone is cut off by a rumbling in his stomach that makes his face twist.

he tries replacing his expression with a smile again, but it looks more pained as another low rumble emits from his body. at this point, everyone in the office is stealing glances. he looks back at the ground as his eyes widen yet again, and only two words are uttered before he takes off running to the bathroom:

"oh shit."

everyone stares at the door, processing what just happened. it was so silent, the only sound you could hear was dazai's rapid footsteps echoing down the hall.

"i knew it." you smirk a bit to yourself.

but your feeling of victory is brief as the horrid smell invades your nostrils. your poor co-workers get assaulted by the same stench, and you all are forced to evacuate.

operation: dairy for dazai was a success, but at what cost?

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BONUS: how chuuya found out about dazai's lactose intolerance

chuuya was the only person who knew of dazai's problem with dairy, but the way he found out was purely accidental and scarred him.

the event took place when they were 17, and they were both stopping for a drink at a local cafe after a mission. the mission wasn't too bad, but it was early in the morning and chuuya wanted coffee. dazai told him it would stunt his already lacking growth, so chuuya wasn't in the greatest mood; he never was around dazai.

"i wanna sit down so you can order for me!" dazai claps his hands together.

"hey! i don't wan-" chuuya begins to protest but dazai cuts him off while walking away.

"you know what i like!"

chuuya grumbles in annoyance as he heads to the counter and orders two drinks. in his fit of anger, he accidentally ordered two coffees with milk and sugar, but failed to notice as he brought the cups to the table dazai sat at. he narrows his eyes as he sets the cup down in front of dazai and sits across from him. chuuya stares out the window to try and tune out dazai when he hears dazai ask him something quietly.

"is there...milk in this?"

chuuya scoffs and replies, "what's wrong, can't handle a bit of milk?"

he was obviously joking, but the sound that emits from dazai's body in response makes him realize it was no joke. dazai quickly stands and runs to the bathroom while chuuya sits there in disbelief, but with the hope that the rest of the day won't be ruined because of it.

that was wishful thinking though, as they frequently had to stop at public restrooms on their way home and chuuya had to deal with the rancid odor that followed dazai as closely as his own shadow.

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