I'm recycling my OC Nanoka from previous Haikyuu! fanfictions. I considered making this a reader insert but I just couldn't get the hang of keeping things physical characteristics out of my writing, and I didn't like using (y/n) or (e/c) and such. This AU!Nanoka is pretty different from the main Nanoka so take her personality with a grain of salt. I'm basically just using her as an ends to all my self indulgent writings.

Yakuza!AU

When Ukai first met Nanoka, she could barely form sentences. With their absentee parents and lack of trustworthy employees, Ukai had practically raised Nanoka. It was his self-appointed responsibility to change her diapers, attend her PTA meetings, and scare away every single one of her boyfriends. While Nanoka loved him dearly, his helicopter parenting and shady background had led her to enter her twenties without a single friend who wasn't part of the underworld. It was depressing.

Nanoka attended a local community college (god forbid she try to even step foot in a different prefecture), usually trailed by Ukai's personal bodyguard, Sawamura Daichi. His amicable smile and easygoing attitude would have helped him blend into the crowd if it wasn't for the black three piece suit he wore every single day. It made him stand out, and therefore made Nanoka stand out, and it was humiliating for the poor girl whose only dream was to fit in. By the end of the first week of college, it was widespread knowledge that Nanoka was not to be messed with, even with good intentions. Nanoka was used to being ostracized, as throughout elementary to high school, parents and teachers warned her classmates to not near her. College was supposed to be a breath of fresh air, a new start, but it was as if she never left Ukai's sphere of influence. Adults who could make their own logical choices, made the judgement on a girl they never even spoke to. It made Nanoka bitter.

If only Daichi didn't tail her around.

If only Ukai wasn't her brother.

To negotiate a territory dispute, Ukai had to travel to Tokyo to meet the Nekoma family head. The Fukurodani was encroaching onto the Black Cat's lands and being an ally, Ukai was going to talk to the boss to gauge whether his support is necessary or a waste of resources. Being Ukai's #1 bodyguard, Sawamura Daichi was obviously going to go with him.

Which meant Nanoka was going to be alone.

Ukai had let it be Daichi's responsibility to find his replacement, and the bodyguard decided it would be a great learning opportunity for the up and coming underlings. Daichi chose Tsukishima, Tanaka, and Kageyama as potential candidates. They were rather new to the organization and lacked experience, but had raw talent. Tsukishima specialized in information gathering and hacking, but had a good amount of judo under his belt to be considered a temporary bodyguard. Daichi's only worry was that Tsukishima had a bad tendency to spurt out opinions and facts no one wants to hear just to gauge a reaction, and he could see that as a explosive combination with Nanoka's lack of tolerance for bullshit.

Tanaka was the oldest of the candidates, and the best at hand to hand combat. Clearly the loud man was the most capable in protecting Nanoka with his experience and skills. Unfortunately, Tanaka's fashion sense, code of honor, and overall attitude screamed 80s yakuza, which Nanoka will not appreciate if Tanaka was going to be even a kilometer near her.

Kageyama was one of the Crow's newest recruits. He was adept in most weapons and capable enough with hand to hand combat, and whatever he didn't excel at, he improved easily with the right guidance. His only downfall was his airheadedness when it came to social interactions and anything related to reading, math, or science. Basically Kageyama was a dumbass, but he was also a genius. Kageyama and Nanoka might have gotten along if Kageyama had been able to read the 'Occupied' sign on the communal bath and didn't walk in on Nanoka taking a bath.

Daichi would have included Noya, Yamaguchi, and Kinoshita on the list, but Noya and Kinoshita were tagging along to their trip to Tokyo and Yamaguchi declined the offer, claiming he didn't feel confident enough in his combat skills to protect Nanoka. Nanoka would have probably chosen Yamaguchi in a heartbeat if he was an option, as the two were close in age and were on good terms.

Daichi buttered Nanoka up to make sure she was in a good mood before meeting the candidates so the chances of her at least half approving someone will increase. Her stomach full of dessert and arms full of new clothes, Nanoka stared down the three men lined up before her.

"He's too tall."

Tsukishima's left eyebrow twitched, but his professional smile did not waver.

"He's too buff."

Tanaka let out a whimper.

"He looks like he needs to take a shit."

Noya grabbed Kageyama before he can lunge at the blase girl. Nanoka ignored him and continued to file her nails. Her left ring nail had chipped yesterday and now she had to even out the length of all the other nails. She gave Daichi a baleful look. Even if she was in a cute oversized striped sweater with thigh highs, her sharp eyes made sure her glare was potent. Daichi sighed heavily.

"Please give them a chance, it's only for two weeks." Nanoka huffed and copied his pose by crossing her arms.

"Where's Yamaguchi? Or even Noya?"

"I told you they're not available to do this job, Ane-san. Just work with me here." Nanoka gritted her teeth. The first few months that Daichi tailed her were horrible and only got better when they finally reached speaking terms, and Nanoka was not going to go through the same experience again.

"I don't like these guys. Find someone else." She commanded childishly. Daichi closed his eyes and pinched the bridge of his nose, feeling a headache coming. Tsukishima steps up from the line and bowed to Nanoka, offering a charming smile.

"Ane-sama, please reconsider your choice. I believe I will be the best candidate as I'm not obvious like Tanaka or stupid like Kageyama here. I can blend in quite well with the college community." Tsukishima lowered himself so he was on one knees, took one of Nanoka's freshly filed hands and placed his lips into her palm. He made sure to maintain eye contact as he whispered into her skin. "If I am too tall, I can also kneel to your desired height."

Then he made a very deliberate glance towards her crotch and licked his upper lip.

Nanoka's eyes widened and Daichi had Tsukishima's face in his large hand before anyone fully registered what happened. Daichi had on the Smile of Death.

"Did you just try to bribe Ojou with sexual favors?" Tsukishima shrugged and played dumb as Tanaka started threatening the blonde for disrespecting Nanoka's honor. The girl grimaced and looked for an escape route when they heard a large crash in the hallway followed by yelling. Daichi instinctively grabbed Nanoka to hide her behind his body and Tanaka moved to occupy his open side. Nanoka did not even notice Kageyama pull out a tanto from who knows where and Tsukishima was pressed against the wall by the sliding door, a blind spot for anyone walking in.

"Ahhhhh! That vase was from Sandaime! Oyabun is going to be so mad!" Someone who sounded suspiciously like Suga shrieked. Everyone's shoulders visibly relaxed at the false alarm. Kageyama put away his tanto and opened the traditional sliding doors to the hallway.

"I-I-I-I'm sorry! I'll cut off my pinky finger-"

"Hinata, this vase was passed down for generations. A pinky finger isn't going to cut it." Asahi interrupted. Nanoka squeezed her way out of the Daichi and Tanaka sandwich to blink at the furiously bowing orange-haired boy in the hallway. He looked like a little caterpillar in his postrating position. He was visibly shaking like a leaf. Behind him lay broken shards of her adopted older brother's favorite family relic. When the boy finally raised his head, Nanoka felt her smile grow into a grin. He was perfect. Her grip on Daichi's arm tightened and he peered down at her. He was startled by her sparkling eyes and flushed cheeks.

"Daichi, I want him as my bodyguard!" Everyone within hearing vicinity turned their head towards her in surprise.

"What?"