Make her a whore

"It's very curious you brought up the idea of looking indecent to steel your nerves, the investigation I'm driving to understand better how lying works would benefit from you acting the part."

"Acting the part?"

"Since you normally put all you got when you help me I'm sure this won't be hard for you, but you'd need to act like you were an actual prostitute all the time. Probably change outfits constantly to try to seduce others to pay you to fuck them."

Kyoko took a moment to think. "Sounds very logical."

Shuichi groped one of her tits, focusing on making her nipple stiffen.

"So the idea would be for me to act like an obscene prostitute to the best of my abilities, fully immersing myself in the role, to seduce others, and report back to you, so you can know how it feels keeping up the appearance of something I detest for that long, and for me to practice undercover work. A mutually beneficial experiment."

"You explained it better than I could."

"How far should I go with my portrayal? As much as I tried I doubt I would be able to really enjoy such a vulgar occupation."

"You need to go all the way. Charge people, even if it's cheap, and pretend you truly enjoy it. If you could write down how you really feel acting this way too it'd be a great help for my research."

Kyoko paused. "It all makes greatly sound logic. But I fear my acting would be discovered quickly. Such a radical change in behavior would be noticed immediately."

Oh if only she knew... With a smile Shuichi readied himself to take care of what others may think.

"What do you mean? It's totally normal for you to act like a streetwalker. Most people still believe the lie that your talent is "The Ultimate Escort". Only I and the academy know your true talent because I am a detective. All we're arranging is you going harder into the character for my research."

Kyoko froze, giving Shuichi a thousand yard stare.

That... That was obvious wasn't it? Kyoko despite her great intellect was registered on the academy as the ultimate escort as a way to improve her skills to go undercover. She wore ridiculous and humiliating outfits just so she was in character and always looked like nothing more than a cheap fuck.

All of the paperwork described her as the ultimate prostitute, and even her personal laboratory resembled a strip club to avoid anyone from catching on to her true talent as the ultimate detective.

The only thing being discussed here is her being more enthusiastic about her fake profession, and writing down how she truly feels for Shuichi to study.

While Kyoko processed this realization, Shuichi didn't seem to stop as he now pressed his body against hers, kissing and licking her face all over.

The emotionless girl snapped from her trance, feeling Shuichi's growing erection through his clothes.

Making no effort to stop him humping her body she spoke: "You are right, sorry. If that would help your investigation I have no trouble acting sluttier."

"Oh, and if you don't mind, just for analysis, it'd really help if you gave me all of your earnings as well."

"Seems fair."

The deadpan girl took a moment to analyse her new instructions. If she was to become a better detective she needed to fuck as many clients as possible. For Shuichi's sake she'd do her best.

Shuichi, meanwhile, could barely hold on to his sanity as his erection strained against his clothes. The absolute stone coldness of the woman he had been harassing the past few minutes making him all the hornier. No matter what he did to her, she didn't seem to react at all!

He could feel the heat of her body radiating through her clothes. The damp air around her pussy that reminded him she wore to underwear under that made-to-measure suit. Her breath just slightly heavier from all the teasing she had endured without breaking her stoic expression.

Finally, he pulled from his back pocket some spare change he had, and pulled down his pants and underwear, revealing his manhood.

"Why not practice before I leave? Try seducing me before we finish here."

The poker faced girl nodded, and took a deep breath.