Nagisa's illness is based on the illness that Nagisa Furukawa from Clannad has, they never really specified what it was so that's why I was a bit dodgy about the illness.
When Nagisa came too he was laying on this futon and he had been changed into his pajamas. At first he didn't remember what had happened and was trying to remember when he got home. As soon as he saw the profile of a certain class mate cooking something at the stove, he remembered blacking out. It was all over, Rei knew and it was just a matter of time before Haru and Makoto found out. Nagisa really didn't want to be fussed over, he hated it really that's why he had asked his parents not to come and take care of him.
"Rei?" Nagisa called out as he slowly sat up, luckily the dizziness had stopped.
Rei stopped stirring whatever was in the pot and looked over to where Nagisa was almost like the was surprised that Nagisa had regained conscious.
"Nagisa! Oh thank god, are you okay?" Rei asked turning off the stove before hurrying over to the blond's side.
"Yeah, I'm fine." Nagisa assured, "Just a little dizzy spell."
"That's good. I made you some rice porridge; do you think you could eat it?" Rei asked gesturing to the pot on the stove.
"Yeah, why would I not eat it?" Nagisa asked like it was a stupid question.
"Well you've got 38.5 degree fever." Rei stated, "Checked it just a few minutes ago.
Nagisa was shocked, he never got a fever this soon usually fevers would come a few days into the first week. Never this early. Nagisa admitted that he felt a little feverish, but his fever couldn't be that high could it? Nagisa attempted to stand before promptly falling back down, if Rei hadn't quickly grabbed the boy's arm Nagisa would've face planted in an instant. Nagisa was sure Rei was saying something but Nagisa couldn't concentrate on him, he couldn't. He had never been too weak to stand this early in the game. The disease was progressing much faster than it had in the past. That couldn't be a good thing.
"Nagisa!" Rei called once more, pulling Nagisa out of his thoughts.
Nagisa looked at Rei with wide eyes, not able to say anything. He was too shocked to form coherent sentences.
"Nagisa, what's going on? What's wrong?" Rei asked he just wanted answers; he didn't want to be in the dark anymore.
"The disease is coming on faster this time." Nagisa said after a few minutes of trying to get the words to come out of his mouth.
"What disease?' Rei asked his heart picking up pace, just what had Nagisa been hiding from him.
It was too late to back down now, Rei knew too much for Nagisa to be able to bullshit his way out of this so he might as well just tell Rei now. Rei was silent as Nagisa explained his illness, trying his best to simply sit there and listen and not say anything until the blond was done. It felt like an enternity to Nagisa, sure he was glad that he could finally get this off his chest, it was a secret that he hadn't told anyone for years and it sort of felt nice to have someone know about it, but Nagisa wasn't sure how Rei would react to it. Nagisa was just glad that it was Rei instead of Makoto; the brunet would probably have a heart attack.
There was a moment of silence once Nagisa finished his explanation, nothing could be heard except the ticking of the clock.
"Why didn't you tell me before?" Rei asked breaking the silence.
"It didn't seem to matter before." Nagisa said, which was true he never got sick another time and since swimming club was summer and fall he never had to worry about getting sick before a match.
"Your healthy always matters." Rei said sternly.
"I never knew you cared about me." Nagisa teased trying to lighten the mood.
Rei proceeded to turn a bright shade of red, "You know what I mean."
Nagisa let out a small laugh out of both happiness and relief, Rei hadn't freaked out like Nagisa had thought he would have.
"Please promise you won't tell Makoto or Haru." Nagisa said, he could deal with Rei knowing but he wasn't sure if he was ready for everyone else to know.
"Why?" Rei asked he couldn't see why Nagisa wouldn't want the rest of the guys to know.
"Just please. Do this one thing for me?" Nagisa begged, talking had exhausted some of his energy and he wanted to have up as much as he could.
"Alright but if things get too bad, I'm going to tell them." Rei said he wasn't going to let Nagisa put himself in danger for whatever reason he had not to tell Haru or Makoto.
"It should get that bad." Nagisa said he wasn't sure if he was trying to assure Rei or himself.
Nagisa wasn't sure how things would go this time around since everything seemed to be different than before. He just hoped that nothing too bad happened.
"The porridge's probably cold by now; I'll go warm it up." Rei said getting up to turn the stove back on.
"It's getting late, you should probably go home." Nagisa said looking at the nearby clock, it was six o 'clock, had he really been out for that long?
"I already called my mom; I'm going to say here until you feel better." Rei said as he periodically stirred the porridge.
"But not even I know when that's going to be! I've been sick for more than a month before. There's no way you would stay here that long. Just go home Rei, I'll be fine." Nagisa insisted he didn't want to inconvenience Rei like this. Maybe if he was healthier, but it just didn't feel right to making Rei do all this for him just because he was sick.
"I'll probably swing by my house for clothes and stuff, but other than I'm going to take care of you." Rei said sounding oddly confident and not in his usual goofy confidence way.
"but-" Nagisa began to say before Rei cut him off.
"Please let me do this Nagisa, it'll make me feel better to know you're alright." Rei said strongly, trying to convey his feelings to Nagisa.
"Fine Rei, you win." Nagisa said pouted before lowering himself back down to the futon.
Nagisa wasn't sure what was going to happen in the future with his illness but for some reason he had a bad feeling about, Like something bad was about to happen.