"I can't find anything in ice demon illnesses that explains her symptoms," Koenma explained to Botan in spirit world's library. He slammed the last book he was reading shut against the table.

Jorge said, "Koenma sir, she is Hiei's sister."

"I know oger," he replied, "the only one that doesn't know that fact by now is Yukina."

"Actually Kuwabara doesn't know either," Botan added. Koenma glared at her.

Jorge continued, "Sir this could be a fire demon illness, that is what Hiei is, isn't he? She is half fire demon like him."

"He's right Koenma sir!" Botan said.

"I'll look under fire demon illnesses," Koenma said, getting out of the chair it was sitting in, "you could be right about this but let's not get our hopes up."


Hiei woke up and saw that Yukina was no longer laying on top of him. He looked over at his shoulder and saw her leaning against him. She must have woken up at some point and saw me, he thought. He carried her back to her bed and stepped outside. The sunlight burned his eyes as he walked along Genkai's porch.

"Where are you going?" Genkai asked from behind him.

He spun around and almost fell over. "I only wanted some air," he answered as he hugged himself.

"Are you cold?" she asked.

"No," he answered, "Yukina was laying on me all night and she's cold." He turned back around and walked away. She sure is cold, he thought.

As Hiei walked toward the forest, he didn't get any warmer like he expected. Instead, it felt like every last ounce of his fire energy was getting sucked out of his body. What's happening? He thought as he sat at the base of a tree.


"Here!" Koenma said, "It is a fire demon illness." He leaned against the tall ladder he was standing on and held the book firmly in his hands.

Botan asked, "What does it say?"

"It's highly contagous to other fire demons," he explained, "and it drains all of the heat energy from their body, leaving the face flushed. Dizziness, fatigue, and short-term memory loss are to be expected. The good news is that it clears itself up, no worries there." He slammed the book closed. "Just keep Hiei away from Yukina and they'll be fine!"

"Oh no!" Botan shouted, "Hiei was the one taking care of Yukina!" She ran out of the room and got out her ore.


Hiei stood back up slowly and held his head. His vision started to blur so he stood still. As he walked back to Yukina's room he started shaking from the extreme cold. He felt the warmth pouring off of his face. "Hiei?" Genkai asked, "Don't tell me you're still not cold."

"I-I-What's-" He opened Yukina's door as everything went black as he passed out.

Botan flew down from the sky and said, "We know what it is!" She saw Hiei on the floor and said, "No, I'm too late!"

Genkai looked him over and asked, "What is this?"


Yukina woke up and saw Hiei laying on the floor of her room. His face was flush and he was under several blankets. "Hiei?" she asked, no good, he was fast asleep. She felt her own face and realized that she wasn't as flushed as she was before.

Her door opened and Genkai stood on the otherside. "You're awake," she said, "it turns out that this illness is contagous to other demons."

"Too bad we didn't know sooner," she said as she looked at Hiei.

"He'll be fine eventually, just like you," she replied, "do you need anything?"

"No," Yukina answered, "thank you Genkai. Sorry to be so much trouble."

As Genkai left she said, "Nonsense, you're sick." She closed the door behind her.


Hiei stirred awake and he opened his eyes. He sat up suddenly and demanded, "What happened?!" He put his head into his knees and wrapped the blankets that were covering him around himself.

"You're sick," Yukina explained from her bed, "just like me. I'm sorry I got you sick, Hiei."

"I've never been so cold," he explained, "not even back in ice world when I was a child. It's so cold." He laid back down and tried his hardest to stop shivering.

She asked, "What did you just say? What about ice world?"

Hiei said slowly, "When I was born it was cold, and snowing. Then Rui threw me off of a cliff while my mother watched." He turned away from her and felt the heat pouring off of his flushed face.

"Rui?" she asked, "Hiei did you have a sister? Answer me! This must mean..." Does that mean Hiei's been my brother this whole time? she thought.

"Sister..." he said as he closed his eyes, "she wouldn't stop crying. They let my mother keep her..." He started to fall back to sleep.

It has to be him, Yukina thought as she closed her eyes to sleep, Hiei's my brother. But why didn't he ever say anything? Will he even remember what he said when he recovers? I have so many questions...will he be willing to answer them?