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A Little Past

Summary:

Chuuya been send to an undercover mission as girl to steal some files for the boss. Dazai just happen to be in the same place.

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Chuuya stare at the reflection of himself in the mirror as Kouyou girls apply some make up on his face. Another stupid undercover mission that had resulted in him being forced to pretend to be girl for an entire day. He sigh and looks away from the mirror.

"You'll do fine lad," said Kouyou with her signature motherly smile. "Just act natural," she reminded him gently. She pats his shoulder and then hands him a small black bag.

"That's all you need. Just make sure to keep an eye out for any suspicious characters."

"Why me Ane-san? This is your job," Chuuya asked her, but he takes the black bag anyway. It contained drugs-in case things got ugly during the mission.

"Well I can't send my girls on such an important mission," explained Kouyou. "Besides you're the only one who has ever worked undercover before."

"Right," said Chuuya dryly. As if undercover work was difficult or something. "Just the file and the mission is done?" he asks, taking another look at their reflection in the mirror.

"Yes and remember what we talked about earlier. Make sure nothing happens during this mission."

"Yes, Ane-san," answered Chuuya.

...

"Dazai san," Atsushi said in whispering tone. "We're suppose to be working!"

They were suppose to catch a criminal called 'The Mad Scientist' after he stole the most powerful drug in history. According to Kunikida, the man were somewhere in the ballroom of the hotel they were infiltrating. He'd been caught in a murder a few days ago which was why they had to get rid of him tonight while they still had the chance.

"But there's this beautiful lady over here. How can I refuse when she's looking this good?" Dazai said back, making puppy eyes at Atsushi. "What kind of gentleman would I be if I didn't take advantage of it? Besides this will be the last time I have to see her before she starts her next life!"

Atsushi give up and lets out a tired sigh, already knowing where this conversation was going. "Fine but if something happens-"

"Nothing will happen." Dazai gave him his brightest smile then pulled him close. A serious face took over instead of the flirtatious one he showed earlier. "Try to get a glimpse of whoever you find suspicious and find out what they're doing."

"Eh?!," Atsushi sputtered. This was definitely not the way he had expected this mission to go. Aren't they suppose to work together?

"Now go on. We don't want Kunikida to scold us because we've lost track of him again." Dazai said playfully and pushed him towards a nearby waiter, giving him a quick wave as he walked off.

Meanwhile, Dazai disentangled himself from the girl he was talking to and started looking around for anyone suspicious. In this place with all the guests milling about and people chatting amongst themselves, it shouldn't be hard to spot someone suspicious right?

He was just walking around when he spotted a woman wearing a kimono. Her ginger hair was braided on the other side and style into a low bun. But her eyes were hidden behind a fan she been holding close to her face so he couldn't recognize her. Still, the way she kept glancing around the crowd made him wonder. He stopped by a random table and pretended to read something on his phone. The whole time he kept an eye on her movements, watching and listening carefully.

The woman however move towards the the stairs and went upstairs. Daxai make a move to follow her quietly from behind. Apparently she did not notice and when she did, he quickly hid behind the hidden wall. He managed to catch up to her, keeping his distance. The woman reached the room and opened the door silently. She looked like she was searching for something inside.

"Excuse me miss," Daxai called. She jumped slightly when the sound came out of his lips. A glare was directed at him.

"You!" the woman exclaim.

Eh he seem to regconize this voice. "Chuuya?"

The woman or rather Chuuya narrowed his eyes at him and raised his finger threateningly, revealing a knife pointed at him, aimed directly at his neck. "Don't call me that, you bastard!"

He took his gun out under his coat without hesitation and put on the same threatening face. "Well chibi~ It seems we found ourselves in the same predicament. Maybe now we can finish our mission together."

"No way in hell! If you even try anything, I'm not gonna hesitate to kill you right here and make it seem like it was an accident." Chuuya's hand tightened around the knife.

"Oh, come now chibi. You know how much trouble you could be in if you get into trouble here." Daxai grinned and put his gun back inside his coat pocket. "Let's forget about this incident and just focus on completing our mission. After all, I have a feeling we will need each other's help more than once." His grin grew wider as he saw the anger slowly fade off Chuuya's eyes.

"Tch…" Chuuya huffed and turned back to continue searching the room.

"Ne chibi-" a knife was tossed in his direction and Dazai catch it in one swift movement. Chuuya glared at him.
"Have you ever considering to shut your shitty mouth even for once?"

"Nope~ Anyway, what are you searching anyway? Did you find something interesting?" Dazai asked, trying to distract Chuuya, while the knife between his fingers.

Chuuya rolled his eyes but kept his attention on what was in front of them. There was some sort of suitcase full of files and papers on the floor.

"Not really. Just stuff relating to our cases. Apparently, I'm supposed to steal a file from someone and leave before anyone noticed." He let out a huff and sat down beside the suitcase.
Dazai sit beside him and started reading the papers on the top folder. They were written in English but it doesn't matter anyway.

"Looks like there's no connection between this guy and the scientist." He put the papers aside and picked up the second folder.

"Huh? What's scientist?" Chuuya asked curiously, leaning forward as he tried to see what Dazai was looking at.

"The Mad Scientist chibi. He stole drugs from the government and used them to start his experiments on human. Then he sold them off to various organizations. Now he works in prison, making his illegal drugs very useful to those who wish to use them successfully."

"Is this the same person that murdered people few days ago?"

"Yep, the same one," confirmed Dazai, flipping through the papers. "He escaped a couple days ago and is now on his way to steal more drugs," Dazai continued to speak while scanning through the papers. "There is also information on where we can find the lab and where their main base is located." He paused, then look up to meet Chuuya's gaze. "One advice from me. Don't go anywhere near that man unless you are absolutely sure that you want to end up dead."

"And why is that?"

"Because that man is dangerous," Dazai replied honestly.

"As if I didn't face even more dangerous people before." Chuuya snort then went back to find that one file.

"Still.." Dazai began as he scanned through the papers. "This man is different from other criminals. For one, he do experiment inhumanely on humans. He probably killed a lot of innocent people in past. Maybe turning them into monster and forcing them to live in solitude until they eventually become mindless. That's not an easy thing to accept. Especially after everything you've been through."

Chuuya stop looking at the files and look at Dazai who is now staring back at him. "You mean..." he trailed off.

Dazai nodded. "That's exactly my point, Chibi."

Silence fell across them again. Mentioning Chuuya's past was a sensitive topic in any situation. Both of them never talk about it much and Dazai decide not to push further this topic.

"Anyway, since the mad scientist might still be out there why don't you stick with me. Who know we might catch him together~" Dazai said in a more cheerful tone.

Chuuya didn't reply right away. He stayed silent, thinking about what Dazai had said. He unconsciously touch the part of his neck where A5158 used to be. Dazai observe the movement and leaned closer to him.

"Is it bothering you?"

"...No," Chuuya whispered as he removed his hand from his neck.

"It looks like it bothers you." Dazai said as he moved even closer.

"I told you it wasn't that bad," Chuuya snapped.

"Then what's the reason?"

A small moment passed as both of them stared at each other intensely. And finally, Chuuya relented with a sigh. "Nothing. Also didn't you find the file just now? Hand it over. Don't tell me you want to look through those files too, do you?" He glared at him annoyed.

The brunette chuckled. "Well Chuuya. If only you help me catch the scientist, then maybe I'll give you the file."

Chuuya scoffed. "If only… So you'd better remember the deal."

Dazai smiled. "Of course. Don't you trust me~?"

"Spit out the plan so I can leave already, would you!?" Chuuya yelled at him while throwing him a glare.

"Alright, alright~" And Dazai proceed to tell the plan.

...

Chuuya wander through the crowd once again, this time he did it in search of a particular person. As Dazai had mentioned earlier, there was no trace of the scientist anywhere in the hall anymore. All the people in that place seemed to be either dancing or having fun together.

He scanned the room carefully.
The dance floor had started to fill up considerably. It appears that most people enjoyed themselves here despite being in a crowded space. People started talking to each other happily, enjoying themselves and smiling wide.

Just then, someone tapped him on his shoulder. Turning around, he saw a man smilling at him.

"You seem lost miss. May I escort you to somewhere less crowded?" The man extended his arm. He was dressed in business suit and had a friendly smile on his face.

"Thank you," Chuuya fight a smile on his face while he took the offered arm. The man immediately led him to an empty corner by the window that overlooked the courtyard. And before he even know it, the man launch an attack which he sucessfully dodge.

With a flick of his wrist, his knife appeared at his hand, perfectly in time to stab the intruder in the side, right on the chest. The man gasped heavily for breath, dropping to his knees. He clutched his chest. Blood spilled from between his fingers.

"How dare you!!" The man growled in pain. He pulled out his gun from his pocket and started to shoot at Chuuya, trying to hit him as hard as possible. But Chuuya dodged each and every bullet effortlessly while keeping calm.

However he didn't notice the incoming kick that came straight from behind him. His back collided against the wall forcefully before his head could hit it. Pain shot through his brain when his head made contact with the wall. He closed his eyes to prevent the spots dancing before him from forming in his vision. When he opened them again, the attacker is now in front of him. The Mad Scientist.

Before the man could reach him, another person jumped in front of the attacker. The newcomer deliver a kick straight to the man's stomach sending him flying backwards before hitting the ground.

"Mr Scientist. I've been searching for you everywhere~" came the sickly voice of Dazai Osamu as he walked towards the man who lay on the ground.

"You bastard!" The Mad Scientist glared at Dazai, trying to stand back up. However his attempts ended up useless because the next thing he knew Osamu had kicked him in the ribs. With a gasp and coughs, the man fell to the floor again.

"Now, Mr Scientist… You have caused quite the trouble these week. I have to say I'm quite impressed that you managed to hide yourself all this time." Dazai bent down beside the Mad Scientist and pulled his hair harshly.

"Fuck!!" The man yelped out loud and tried to pull himself free from Dazai's grip. But Dazai simply laughed and pushed his hands away, holding the man's hair in a tight grip. "Don't struggle so much, Mr Scientist. We need your information. Why did you take the poison from the laboratory?"

"Why should I tell you shit?!" The man spat out, trying to pull himself free even more.

"I thought so~." Dazai let go of his hair. A gun was placed on his forehead and the man stopped struggling. "Now answer my question, Mr Scientist."

"So what?! Just kill me if you can't get the answers out of me! I don't care!"

And with that, a trigger was pulled and the man screamed in agony before falling limp and dying. Dazai stood up and looked at the body for a bit before putting the gun back inside his coat.
With the corpse lying lifelessly on the floor, Dazai slowly turned around and looked at Chuuya with an impassive stare. Chuuya didn't say anything as he just stared back at him as well. The two remained quiet for sometime until the sound of footsteps echoed throughout the whole hallway.

In seconds, Atsushi appeared in front of Dazai and Chuuya. He gasped seeing two lifeless body on the ground, "Dazai san! What happened here?!" Atsushi asked frantically.

"They kill themselves." He responded nonchalantly.

Atsushi turned towards the body. "But.. they look like.." Atsushi trailed off as he glanced back at Dazai who gave him a blank expression. His eyes quickly widen. Then his eyes drifted back onto the body.

"..Oh."

There was silence once more.

"B-But I thought we not suppose to-!" Atsushi panicked.

Dazai just shrugged, "Sometimes there are exceptions to rules."

...

"Hey," Dazai called out to Chuuya who was sitting outside in the garden.
Chuuya looked up to see him walking towards him. A file was handed to him silently.

"I'm not breaking my promises aren't?~"
"...Shut up." Chuuya mumbled as he grabbed the file from Dazai.

"Come to think of it, how about I make some new ones?" Dazai suggested, wiggling his eyebrows suggestively at him.

"Go to hell."

Dazai giggled before taking a seat next to him. After awhile, the two sat silently together until Chuuya spoke up, "...Thanks for helping me find that stupid file. I mean, I could probably found it by myself but whatever. I appreciate it. Thanks." Chuuya muttered, still looking ahead not daring to face Dazai.

"...Anytime." Said Dazai with a bright smile on his face.

"And I'm sorry." Chuuya added quietly. The brunette turned to look at him.

"For what?" He asked although he aleady knew the answer to that.

"You know why." Chuuya said, still not looking at him.

"Chuuya be specific~ If you talking about the fact that I just killed someone, then you're not in the place to feel apologize for that. I did it for a reason~."

Chuuya stayed silent.

"Also, you're welcome~" Dazai added smugly.

"Stop saying things like that." Chuuya grumbled angrily. "It's annoying!"

"Ahh, I'm sorry~ How should I phrase it?" Dazai sighed dramatically as he rubbed his temple. "You're so difficult~" he continued teasing Chuuya.

Chuuya's eyes narrowed threateningly at him. Dazai just raised his hands defensively and kept smiling innocently. "Alright alright~ Say Chuuya, the moon is beautiful tonight~" He changed the subject abruptly, looking at the night sky instead.

"What about it? The sky always looks nice with or without the moon." Said Chuuya flatly.

"Chuuya how can you be such a boring old man sometimes?"

"You know what?! Screw off!" Chuuya snapped annoyed.

"Okay fine~" Dazai gave in after seeing the anger flashing in Chuuya's eyes.

"But seriously, the moon is pretty tonight-" Dazai didn't even get to finish his sentece as he felt another lips pecked on his cheek lightly, causing him to stop abruptly.

"Goodnight bastard."

The moment Chuuya finished his sentence, he vanished into thin air. Dazai left dumbdfond staring at the spot where he disappeared just moments ago. There was only silence and darkness surrounding the gardens, apart from a few stars shining brightly above them.

Dazai slowly brought his hand to his cheek. He could still feel the soft, warm sensation of lips caressing his skin. He couldn't help but laugh slightly in disbelief. The first kiss he ever got from Chuuya.

"Dazai san!" Dazai heard Atsushi calling him from a distance.

"The police has arrive to clean the mess. The bodies of the Mad Scientist has been sent to the lab for investigation."

"Good. I believe our cases done for today." Dazai replied, standing up from his seat. "Say Atsushi, would you mind a drink?"

"Eh? Really?" Atsushi answered hesitantly, unsure.

"Mmhm~ Let's go."