For a prompt suggestion, how about a KaiAo AU where Aoko and Kaito don't know each other but Aoko becomes friends with Kaitou Kid?

The Touto Tower wasn't titled as the most iconic place in Japan without a reason. What's more when Aoko was situated on the roof without any glass windows to obscure her vision of the magnificent view around her... Everything was perfect; the city lights were just remarkably brilliant and amazing.

But despite the beautiful sights and the comfortable, chilly wind that consistently blew by, it didn't quite complement with the pain she was feeling at the moment. She wondered if she wasn't in her current circumstance, would it be a different experience?

Looking away, Aoko stared at her companion for the night.

"Thank you." She finally said after finishing getting distracted by the view.

"Hmmm? What for?"

Aoko inwardly sighed, watching Kid sitting next to her as his attention was on bandaging the knife wound on her arm. Working with him for so long, she knew feigning ignorance was Kid's best skill... out of all his non-useful ones. She inwardly considered where she should invest her diminishing energy on— Keeping her face neutral as her skin tingled under his gloved hands' touches or trying to pry words out of his secretive mouth?

In the end, she decided on the latter. Between them, most silences were filled with more tension—be it serious or sexual—than their usual nonsensical and spiteful conversations.

Besides, Kid deserved much more credit than he would ever take anyway.

"For saving me." She answered.

Three words were all she needed to summarise the losing fight she just had with the Mafia boss she was privately investigating, until when Kid joined in and got her out at the last minute with his fanciful smoke bombs and temporary white wings.

Kid suddenly laughed, which took Aoko by a whole lot of surprise. "You're expecting too much from me." He said.

"Then what am I suppose to expect?"

"A bad guy with bad intentions." He grinned under his hat. "I was betting on the chance you'd be grateful enough to get in bed with me tonight."

It wasn't the first time she heard him joke about sleeping with her, and it wasn't the first time she got annoyed at him for that too. But Aoko decided to try something new today.

"Sleeping with me means you'll be taking your mask off." Aoko smirked when she noted the millisecond pause in his bandaging work. "Along with your hat, suit and monocle; everything."

"That sounds about right." He said, his voice laced with contemplation as he continued wrapping the bandage around her arm. "Same goes for you; your shirt, pants and sexy hot pink bra. Are your panties a matching one?"

The only reason that stopped Aoko from hitting his head was for the sake of her injured arm. "You'll never ever know." She gritted her teeth.

"Damn," Kid exaggerated his sigh. "I guess it's now on my list of mysteries I'll never figure out."

"And I thought you're a walking wikipedia."

"I have limits for certain things."

She wondered about that. "How many mysteries could you not figure out, then?"

"Just three. Including your panties' colour."

Aoko rolled her eyes. "What's the other two?"

"You."

Aoko blinked. "Me?"

Kid nodded. "And us." He said.

Temporarily shock to a mute, Aoko could only stare at him, eyes wide and wondering if she should believe in the sincerity in his voice. But she didn't have the time to figure it out as he leaned forward, closing the space between his lips and hers.