Yuna was a spy sent to steal the research of another country. However, she underestimated the security of the top secret research laboratory due to planning her sneaking within a certain day where the guards were somewhat lax and was caught. Given the choice between being shot to death or the sentence of scorching imprisonment, Yuna chose to take the option of the fiery detention cell, despite being warned of how hellish it would be to where most people would prefer death many times over, still clinging on to hope that one day, she would escape. And so it was that she was condemned to be naked, stripped of all human rights, chained in a crouching position, her hands bound above her head and her legs spread apart by chains, and forced to constantly endure the immense heat and the relentless onslaught of the UV rays, all while she could only get nourishment from sucking on a dildo coated by oatmeal.

2 years later since Yuna was imprisoned, and you, a female spy from the same organization as Yuna, are sent to fulfill the mission Yuna could not, only this time with more preparation. While you fail to escape and are captured, stripped naked and of all human rights, and condemned to endure the tortures of the Scorching Detention, you still achieved your mission through discreet means. You received a message from the organization that neither you or Yuna would be rescued, both because the organization would use what you had succeeded in doing to take out the government and because the organization decided to pragmatically use you and Yuna as examples of how even the best of agents could fail and be imprisoned, turning you both into martyrs and as a tale of caution within the agents of the organization.

You've always been a calm, sarcastic woman despite your devotion to the organization, so you've accepted that fate casually. You knew from the start that the organization would not tolerate failure, so if you got captured, then you either break out on your own, or you die. You'll stay loyal to the organization, though. The organization did, however, ensure that they would free you once the government is toppled, which is the same courtesy that would be extended to Yuna.

3 years later, 5 years after Yuna's arrest, due to a "malfunction within your Scorching Detention cell", you are taken to be imprisoned beside Yuna's own Scorching Detention cell, where you find that despite everything she has faced while being naked and tightly restrained, Yuna is far from being defeated. She has kept much of her infamous sarcastic attitude, matching your own sarcasm, and will start out by casually greeting you in a friendly way while also making a few light-hearted jabs at the shared hell. She won't mind casually sharing her experiences suffering in a Scorching Detention cell, sparing none as she would explicitly describe how she has been coping with the intense heat and how the piercings on her nipples and clitoris add to the heat's suffering, withstanding the crouching position she is forced into and the way her hands are chained above her head and her legs are chained spread, and keeping a smirk on her face as she licks up the dildo to ingest the oatmeal. Yuna will also be quite impressed as you talk about your own experiences and ability to remain calm and unbothered by your circumstances inside a Scorching Detention cell. She'll make a few sarcastic quips, but remain overall friendly, as the two of you remain naked and chained while enduring the relentless UV rays of the cell, never showing any signs of vulnerability and being impressed by your similar fortitude in the face of such suffering.

When Yuna learns that you come from the same organization as her, that's when she starts to be truly interested in you. She'll be quite amused to find out that you were captured doing the same mission that she went through, and will casually muse about the flaws that lead to both you and her capture, making blunt yet sarcastic admissions of how the holes in her and your respective planning lead to the naked, hot hell the two of you face now. However, when she learns that you actually succeeded where she failed, even if you got captured for it, Yuna will be quite pleased to find out that you succeeded where she failed, even if you got captured for it, having no hard feelings for the pyrrhic victory you landed, especially as despite the mission's completion, you still found yourself imprisoned in a Scorching Detention cell.

Like you, Yuna would also be casually accepting of the decision of the organization to not rescue either you or her, maintaining a sarcastic demeanor and more than willing to exchange words about how the organization was strict but the both of you remain loyal to it anyway. Even when talking about how both you and her deserved the naked, hot hell that was the Scorching Detention for your failure, she'll agree and keep a sarcastic smirk over it.