Author's Note: This is my first Hataraku Maou-sama! fanfiction. Co-Workers to Lovers is going to be a Mini-Series which will consist of roughly 3 - 5 chapters. Depending on how well this series turns out, I may do more in the future. Anyway, I hope you all enjoy!

Oh and if you're wondering about the rating... That's for later!

Chapter One: The Devil Stays the Night

Tick… Tick… Tick… Tick…

The sound was horrifyingly mind-numbing. "It's almost… Seven…" Sadao lazily celebrated. The day had been dragged out for far too long. They hadn't had a customer in over four hours thanks to a raging storm outside. The demon lord sat on the floor, head against the counter, listening to the ticking continue on and on. Sadao had done everything he could. He'd cleaned every surface and wall three times and the toilets were sparkling brightly.

He'd been sitting on the ground for about two hours with a companion. Across from him sat Chiho, a co-worker who'd been working just as long as he had. She hadn't said a word in just over an hour and her face gave off a blank stare. Her mind was racing and her body was shaking. "Chiho… Are you okay?" No reply. "Chiho?" Still nothing. Sadao crawled along the ground towards her. "Chi?" He asked once more, no more than a few inches away.

"Gaah!" She cried out, her face suddenly turning bright red. Her arms flailed about, hitting napkins and straws across the counter, spilling them over the clean floors. "Aah! I'm sorry Mr Maou!" She panicked, picking them up as fast as she could.

Sadao calmly helped her, more concerned about her than the straws. "What's up Chi?" He asked again now that she was back in the realm of the living.

"I uh, I just uh…" Chiho couldn't manage to get words out properly and that's when the lightning struck. The flash lit up the entire grey sky above the MgRonalds. "Waaaahaahaaa!" Chiho cried out, ducking for her life. Sadao smiled, then giggled, then laughed. The thunder came next only seconds later. Chiho covered her ears and forced her eyes shut until it was over. The demon lord was still cackling away when Chiho pouted in his direction with puppy dog eyes.

Sadao realised his mistake and immediately felt guilty. He straightened himself up and held out a hand for the scared girl. She took it after a moment's hesitation. She looked directly forward, getting locked in his red eyes. She blushed a little and gave a small blink. He was gone. "Whaa?" She started to scream.

"Whoa, Chiho, what is it?" Maou was right behind her. Apparently her small blink wasn't as quick as she thought as he'd already walked passed her to grab his coat. "It's seven so we can go." Sadao did somewhat of a jog towards the staffroom. His busty co-worker followed closely behind. As she opened the door, she saw a different Maou from before. This one looked as if he was about to cry. "What if I get fired? It's not my fault if there were no customers! But what if this was a test? Maybe I was meant to go out and find customers! Maybe my boss was watching me slack off! Should I have cleaned the toilets again? I can't lose my job, I have to pay for all of Urushihara's bullshit! This is bad… Maybe I sh-"

"Mr Maou?"

"Aah! Chiho… You startled me!" Sadao tried to return his breathing rate back to a normal state. "Sorry… I was just thinking out loud!" He chuckled nervously. Chiho opened her locker and grabbed her bag that was nestled inside. The demon lord grabbed his umbrella out and carefully closed his locker with great respect for the company he was employed with. The schoolgirl slammed her locker and swung her bag over her shoulder.

Chiho opened the backdoor of the establishment and not even a second later lightning and thunder soared through the skies. "Raaaaaaaaah!" Chiho dived under the table, clinging to the legs of the surrounding chairs for support.

Maou Sadao couldn't look directly at her due to her flashing without realising. "Uh, Chi… Do you want me to walk you home? I have an umbrella after all." Chiho looked up with hopeful eyes, as if the lightning didn't happen she was back to normal. She nodded profusely, her two ponytails flicking about like mad. "Well come on then." He smiled, holding the door open for her. Her walk had turned into a skip of sorts.

"T-Thanks Mr Maou!" Chiho looked down at her damp shoes, trekking through small puddles on the sidewalk. She held her hands together behind her back, swaying her shoulders slightly. The demon lord noticed this, but was oblivious to the fact that she was doing this to push her already large bust out. The rain was coating Sadao's left shoulder while he held it completely over Chiho and only partially over himself. "I really appreciate this!" Chiho was smiling the whole walk, but was finding it hard to look up in case they locked eyes again. She fretted that it would make the rest of the way awkward.

Crashing thunder roared over the town, scaring children and Chiho alike. The MgRonalds worker yelp and gripped onto Sadao for comfort out of reflex. It was hard for Maou to hold back laughter, but he didn't want to embarrass her or make her mad; instead he bit his lip to stop himself. "Here." Satan switched his umbrella to his left hand and grabbed Chiho's hand with his right. Even after the switch, Sadao still held the umbrella over Chiho, letting himself take the brunt of the rain. His readings told him that men were supposed to do this.

Her hand was incredibly warm and comfortable in his own. Chiho continued to look at the ground, trying to hide her bright red face. She slowly started moving closer to him as they carried on with their walk. Eventually their arms made contact with their sides, but that didn't cause an issue as they carried on walking while their butterflies tried to escape.

It was then that they arrived at the Sasaki residence. Chiho unlocked the front door as quickly as she could to get inside her warm house. "Well, I'll see you later Chi!" Maou waved, stepping back on the footpath.

The thunder and lightning made another visit as the wind picked up. Sadao lost grip of his umbrella, sending it away into the air. Vulgar words rested at the tip of his tongue while he watched it dance in the heavy breeze. He glanced down at his clothes, his left side was already soaked and his right didn't stand a chance of staying dry now. A loud sigh was all it took for his mood to be changed to a somewhat depressing attitude. He looked back over at Chiho's house, noticing the door was still wide open along with the young girl in a ball, using her arms to shield her from the lightning. This immediately changed his mood as he walked back up to her home.

"You okay Chiho?" He asked, red eyes staring into amber.

Suddenly she clung to the demon lord's work shirt. "C-Could… You stay the night… Mr Maou…" She whispered.

He smiled and helped her to her feet once again. "If it is alright with your parents. After all, I lost my umbrella and the storm is picking up…" She grappled him in for a hug. He felt her large chest press against his body, bringing some red onto his face. "Because… If I walk home now… I'd get sick and I cannot miss work!" He carried on, feeling strangely embarrassed from her hug. Chiho took a deep breath, smelling Maou's shirt. She fawned over it although it mostly smelt like MgRonalds, there was still a faint scent of his cologne left. It wasn't anything expensive otherwise Ashiya would complain and that was more than enough to bring up a headache. He scanned the living room, looking at points of interest such as the television, the rug and her coffee table. All this was an attempt to lose the blush, but once a full minute had passed and they were still in the same position, he decided that he'd have to end it. "So, where are your parents?" He asked, slowly loosening her arms.

"Mr Maou…" She beamed with a face of bliss.

"Chiho?"

"Huh!?" Her eyes shot open.

He closed the front door, stopping the rain from coming in. "You've been doing that a lot lately. I asked where your parents are."

Chiho looked away and slowly started marching down the hallway. "Umm, they won't be back until late. Work and all…" She muttered.

"Oh… Then are you sure it's okay?" Maou asked, following right behind her.

"Yes! It's absolutely fine!" She practically shouted. Sadao was slowly beginning to think she had a screw loose somewhere. "Come on, I'll show you my room!" She smiled, now walking at a normal pace. The door opened wide as Chiho let Sadao enter first. It was relatively tidy other than a few bras, panties and books scattered around the place. "Whaa!" She shouted, knocking Maou out of the way as she bolted in, picking up every bit of clothing she could carry and shoving them in her closet. "I-I'm sorry about that Mr Maou!" He gave a small smile. This was his first time in a high schoolers room, let alone a high school girl's room. She sat down on her bed and patted the spot next to her, signalling a seat for the demon lord. "What uh, what do ya think?" She asked, shuffling around a little to get comfortable.

"It's nice. I like that dress you have there." He pointed towards her closet door with a dress hanging off the doorknob.

"Oh you do? Then uh, how about we go on another… Date! I'll wear it for you!" Chiho smiled enthusiastically, leaning in close again. Sadao nodded with a bright eyes. Chiho began to scream happily in her head. She was just hoping it won't end up like the last date with the mall collapsing. "Can you make it on Sunday?" She asked, flicking through a diary calendar. He nodded again, still looking around her room.

He looked at the clock on her night stand, noticing an hour had passed since they left MgRonalds. "So, where am I going to sleep?" Maou asked, looking at the only bed in the room. "Am I taking the couch?"

"No! You can take my bed!" Chiho clapped with a wide smile.

Sadao scratched the back of his head. "But I can't let you take the couch…"

Chiho shook her head. "We'll both take my bed!" Some sort of adrenaline had taken over her thought pattern, letting these words slip through like they were nothing. Maou blushed at the thought of sharing a bed with his cute co-worker sidekick. Sure he wouldn't actually mind it, but if her parents came back and saw a grown man sleeping in the same bed as their precious baby girl, he's not going to be allowed back anytime soon.

"How about I take the floor next to your bed." He suggested. "That way, I'm still in the room with you, but you won't get in trouble for letting me into your bed…"

"Oh Mr Maou… You're so thoughtful!" She fawned with eyes as big as the moon. He continued to blush as she dragged in a futon, unfolding as she tugged it along. "This is the guest futon we have. I hope you're okay with it!" She bowed slightly as it bunched up on the floor.

"Thanks Chi." Sadao smiled, straightening out on the floor. "We should go to bed within the next two hours, we both have a full day of work tomorrow!" Chi nodded, scooting over to her bedside table. She slowly pulled it open and left it, leaving the contents inside viewable. Inside were rather suggestive items including a small packet of condoms, received from her school as a precaution hand-out. A pair of erotic lingerie that actually belonged to her mother and finally, a blurry image of herself in underwear in front of a mirror. Nothing was properly exposed in the photograph, she was just trying her damn best to get Maou's attention and to possibly see her as much more than a co-worker.

Chiho stood up and raided through her closet. "Sorry Mr Maou, I'll be right back! I just need to change… Into something a little more comfortable." She fled out the door, slamming to shut behind her. She was burning red, hoping something sunk into his head. In the bathroom, she pulled off her MgRonalds uniform and threw it to the side. She posed in the mirror, trying to find an appealing position. She tried with her breasts being pushed out and with her breasts being pushed together, but in the end, she was just embarrassing herself. She threw on her yellow pyjama top and bottoms before returning back to Maou, leaving her uniform in a crumbled pile. She pushed open her bedroom door to see Sadao looking through her window, watching the storm pick up. "I uh… Suppose you want dinner."

Sadao looked behind to see the short, but busty co-worker standing in the doorway, dressed in her nightwear. "Oh, yes please." He bowed slightly, walking towards her.

"I'm not too sure what we have though…" Chiho drummed on her thighs, walking towards the kitchen. "Uh… It seems we have a few microwavable meals. If you're okay with that, that is!" Maou nodded with a big smile. Chiho was about to lose herself again, until she almost dropped the meals.

The microwavable meals didn't take too long to prepare and they both began to dig in right away. Once it was over, Maou thanked her sincerely for the meal to which Chiho blushed and panicked at the same time.

The following two hours resulted in Sadao's lack of awareness towards the drawer and Chiho's slight frustration although she wasn't too annoy considering she was having a long discussion on the fundamentals of magic from Ente Isla. She found his world to be fascinating and enchanting, but at the same time, scary. Both Lucifer and Sariel were from Ente Isla and held her hostage with that same magic.

"And then Urushihara tried to fool me by calling 'hentai' a type of software rather than a noodle brand!" Sadao laughed with bright eyes. Chiho blushed a little, not going to try and correct him for both of their sake; Urushihara too. "Well, it's getting late Chi… I think I'm going to nod off. Thanks again Chi, this means a lot." He wiggled around in the futon and threw off his shirt and pants before he beamed up at her, pulling his duvet up to his neck and closing his eyes.

Chiho stared down at him from her bed with wide eyes. After a few seconds, she made the decision to shut the drawer for the night, knowing nothing was going to happen now. She was turning a shade of red, thinking about what could've happened between them if Maou was a little more, adventurous. The night became hotter as Chiho's thoughts engulfed her mind. She began to rub her thighs together, feeling a little adventurous herself. She removed her bra for the night, hiding it under her bed.

"Oh and Chiho. Good work today!" He grinned up at her before rolling over, back to sleep. Chiho was frozen, she was almost caught doing something she'd rather die than be discovered doing. She gulped deeply and forced her eyes to shut. Sleep was a nice escape route after all.

Author's Note: Thanks for reading and I hope you enjoyed. Please remember to follow, favourite and review. What should Chiho have done to get Maou interested in her?