After Wasabi wished him goodnight, Hiro made his way up the stairs in time to see Tadashi shrugging off his jacket with a wince. His back was to him, so Hiro had a clear view of the black mark on his shirt that spread from the center of his back out towards his shoulder blades. Tadashi tossed the jacket onto the floor and relaxed a bit, pulling on the back of his shirt so that it didn't press against his skin. Hiro frowned at the obvious discomfort, and was about to make his way to their shared room when Honey Lemon came down the stairs with Baymax following after her at its slow pace.

Hiro was thankful that his friends were bright enough to do what he wanted them to do, not what he told them to do. He turned his attention back to Tadashi.

"You okay, buddy?" As Hiro drew near, the scent of burned cloth became stronger, and the momentary panic that he had experienced down in the café flared for a moment before he managed to tamp it down. He'd been surprised at the heat that Tadashi had been giving off when he had put his hand on his shoulder earlier, so as he repeated the action, he did so slowly, and with a lighter grip.

Tadashi nodded, looking up at his brother with an apologetic smile. "I'm okay. My shirt was just sticking to my back in a weird way." He shifted, pulling on the hem of the ruined shirt, unaware of the damage.

"Well, I hope you weren't too attached to it." Hiro grinned at Honey Lemon as she handed him an old shirt of his to give to Tadashi to replace the one he was wearing. Honey Lemon squinted at him, with a small smile of her own.

"Was that a pun?" She asked as she pulled out her phone and began to scroll through whatever was on the screen.

Hiro simply laughed.

Tadashi struggled into the new shirt, which was too big for him, but didn't press uncomfortably against his back. He startled slightly when Hiro moved him by the shoulders to stand directly in front of Baymax.

"Baymax, scan him."

The determined look in Hiro's eyes concerned Tadashi. "Hiro, I said I'm fi-"

"Scan complete. Hiro, please exhibit caution, prolonged exposure to high temperatures could lead to burns."

Tadashi's quiet "What?" was ignored as Hiro tightened his grip on his brother's shoulders. He could feel the temperature difference, but it wasn't painful, just surprising.

"Report, Baymax." He'd have to fix the coding for Baymax's warnings if they were going to interrupt patient observation for something trivial.

"Tadashi is in perfect health, though his internal temperature has increased significantly from his last scan. Updating patient files now."

Hiro nodded, satisfied that his brother was okay, but Tadashi pulled away from his grip, drawing closer to Baymax with a worried expression on his face.

"Increased to what, Baymax?" Tadashi drew his arms in closer to himself, holding the t-shirt he had previously been wearing close, and hunched his back slightly.

Hiro recognized the body language Tadashi was displaying; he had done something similar after he had inadvertently burned Callaghan.

"Scans indicate that your internal temperature has settled at 300.2 degrees Fahrenheit, or 149 degrees Celsius. However, you are expressing different temperatures across your body." Baymax pulled up a screen on his stomach, and highlighted the image's back, hands, and face. "Your hands and face are 104 degrees Fahrenheit, but your back is steadily decreasing in temperature."

Beside the image, a small reading popped up, showing that the temperature had rapidly decreased from the 330°F it had been when he first scanned him to the 140°F it was at the moment, and it was still dropping.

Tadashi clenched the shirt in his hands tightly in growing terror, and Hiro wasn't sure how to comfort him. He and Honey Lemon exchanged a look, but she appeared as uncertain as Hiro felt.

"D-does that mean it can get worse?" Tadashi moved away from the others, frightened of the possibility of injuring his brother and one of his closest friends. Hiro was moving to approach him, when he looked closer at the shirt in his hands. He ran his thumb over the scorched fabric, and watched as it darkened under his touch. He dropped it to the floor. "I-I can stay outside. Concrete doesn't burn, and-"

"No." Hiro wasn't about to let his brother kick himself out of the house, especially not when something could be done about the issue. A quick glance outside confirmed that there was no way he was going to let Tadashi spend the night out there. Rain was coming down in sheets; nothing was spared from the deluge. He willed his mind to think quickly and he knelt down until he was eye level with his brother. "Hey… I'll figure something out. Maybe something you could wear under your clothes…"

His brain was jumping around, discarding and building on ideas until he thought he had something that could work. Since the issue was with the heat he was giving off, and not Tadashi's health deteriorating because of the rise in temperature, then maybe he could do something about it through containment.

The entire thought process took a couple of seconds at most, but Hiro had been crouching there long enough for Tadashi to start shaking, even as Honey Lemon assured him that things would be okay.

"Honey Lemon, do you think you could help me put something together?" Hiro's idea could work, but his previous sewing projects had ended abysmally, regardless of the multiple attempts of others to try and teach him. Fabric stretched in ways that carbon fiber did not, and cutting it accurately was a skill he hadn't quite mastered. Honey Lemon's interest in fashion design had prompted a quick study of the combinations of materials and fabric when the topic of costumes had come up five years before. It was thanks to this knowledge and Wasabi's meticulous measurements that the armor had fit the team members at all, and didn't look like it was designed by a five-year-old.

…No offense, Tadashi.

Hiro dug around in the garage, pushing past spare parts and unfinished projects while hoping to find what he was searching for.

Please don't have thrown it out. This is why I keep everything. It's got to be here somewhere.

Hiro heard Honey Lemon on the other side of the garage as she sorted through things he had already pawed through.

Well, two eyes are better than one. It's possible that I missed something. …unlikely, but—aha!

"Found it!" Hiro dragged the roll of mesh, which stood as tall as his shoulder, to the center of the garage and let it fall with a loud thud to the floor. He didn't remember it being that heavy.

"Perfect!" Honey Lemon made her way over, clasping her hands together in excitement momentarily before she began to unravel the material across the space they had cleared. "Okay, this should be plenty. Come over here, Teddy. Do you think this will do for now?"

Tadashi had curled up against Baymax, after it had been determined that the vinyl wouldn't be damaged by his current temperature, and was barely keeping his drooping eyes open. He blearily made his way over to the silver mesh that was spread out across the floor. He laid his hand against it as Honey Lemon explained that they had originally intended for it to be a part of Fred's suit, as a protection against the flames the costume spewed from the front. The thin fabric had been deemed too flimsy, and an alternative was developed, but Hiro, forever a packrat, had kept it in case they had need of it later.

Tadashi ran his fingers over the woven cloth, noting that it was tightly knit, though it was ridged like square scales. The material was much softer than he had expected it to be.

"This stuff can take up to 2300°F, with short excursions to 3000°F." Hiro crossed his arms, smirking down at his brother. "I tested it with a blowtorch when we first got it. The other side didn't even feel warm."

Tadashi furrowed his eyebrows. "So… you're telling me that you superheated a piece of cloth and then touched it?"

Hiro winced as Tadashi glared up at him. That had definitely been on the list of things not to tell Tadashi. "Hehe, um… yeah?" Hiro ran a hand through the side of his hair. "For science?"

Tadashi crossed his arms as Honey Lemon hid a giggle behind her hand at the sight of an adult being reprimanded by a five-year-old. She snapped a quick photo of the scene before turning to Baymax to get the rough measurements needed to cut the cloth so that the end product would fit Tadashi. After drawing a quick outline on the fabric in chalk, she passed some scissors to Hiro, insisting that he would get better at it if he practiced.

As Hiro grumbled and cut as cleanly as he could, Honey Lemon settled down next to Tadashi, who had curled up so that his chin rested on his knees and his arms were wrapped around his legs. She ran a hand through his hair in comfort, wishing she could just scoop him up into a hug, but knowing that it would only make it worse on the off-chance that he accidentally burned her. He offered a small smile to her, and she remembered a way to hopefully brighten the mood.

Hiro was deep in concentration when Honey Lemon's voice brought him back to the present.

"So, your Aunt Cass woke up. That's pretty exciting!"

Hiro glanced up from what he was cutting in time to see a wide grin take over Tadashi's previously somber expression. He smiled softly to himself, mentally thanking Honey Lemon for reminding Tadashi of the good he could do, even while they worked on minimizing the bad.

Turning back to his project, he listened to Tadashi describe what they'd done, and how they'd had to hide because of how illegal their actions probably were. Hiro tensed at this, not hearing the continuation of the conversation as his mind reminded him of exactly why he'd wanted to keep Tadashi a secret.

It was likely that there was no end to the tears' ability to heal, and if a government or corporation found out about it… the word 'harvesting' flashed through Hiro's mind. His grip on the scissors tightened as his mind helpfully supplied images of someone hurting his brother to get what they wanted. He didn't care if it would be 'for the greater good.' It had been bad enough when Tadashi had cried to ultimately heal their aunt, but the thought of someone forcing him to made Hiro's blood boil.

Never. Hiro found a new satisfaction as the scissors sliced their way through the fabric. No one will ever hurt him.

The three of them made short work of stitching the pieces together. Admittedly, Tadashi was unable to thread the needle without help, and his stiches were wide and uneven in places, but it did the job, and it was only a prototype to last until they could make something more permanent. It wasn't like Hiro's work was much better.

While Tadashi was changing in the bathroom, Hiro and Honey Lemon lingered outside in the main area. Honey Lemon was scrolling through her phone, smiling every now and then. The growing curiosity was killing Hiro.

"Okay, what are you smiling at?" Hiro peeked at the screen before she could even think to stop him, and stilled for a moment before snatching the phone and scrolling through the particular photo set she had been viewing. "Are you kidding me?"

How many of these did she take? When the files kept going, Hiro couldn't help dissolving briefly into helpless and exasperated laughter as he passed back her phone. "I'm new to this, but I'm pretty sure taking pictures of an employee without their permission counts as harassment. This is a lot, even for someone like you, who takes pictures of everything." He grinned up at her, a teasing glint in his eyes.

Honey Lemon shrugged unashamedly. "What can I say? He's pretty."

Hiro rolled his eyes, before running a hand over his face. "…unbelievable."

"So, how did Fred react to Teddy's powers working on your aunt?" Honey Lemon slipped her phone into her bag, giving Hiro her full attention.

Hiro froze. "Uh, I actually haven't told anyone other than you and Wasabi, since you guys were here when we got back…" Hiro nervously rubbed the back of his neck. "In fact, I kinda forgot about telling anyone when Tadashi burned through the back of his shirt."

Honey Lemon raised her eyebrows in surprise. "You need to tell them, though maybe first thing in the morning would be better…" Her watch proudly displayed the time, 11:52.

"I will-" Hiro was cut off as the bathroom door opened.

"This feels weird." Tadashi was pulling on the mittens that Honey Lemon had thrown together at the last minute, and Hiro tried to suppress a laugh at how ridiculous his brother looked. He failed, and Tadashi glared up at him.

"Can you really blame me? You look like you're wearing a tin-foil onesie, except it's cloth instead of metal." Hiro turned to Honey Lemon, making sure she was getting plenty of photo evidence.

The fabric covered everything from Tadashi's neck down, though the mittens could be removed, and everything else could be covered by regular clothes as long as he wore long-sleeves.

Honey Lemon wished them good night when it became clear that things were under control for the moment, and headed out into the night, grateful that the rain had stopped.

Back in their shared room, the brothers were getting ready for bed, but Hiro would catch Tadashi wincing and fidgeting every now and then.

"Dashi?" Hiro decided he could no longer ignore it when his brother hissed in pain when he reached up to pull himself onto his bed.

"I'm okay, I can ignore it." Tadashi shook his head, before pulling himself the rest of the way up.

Hiro approached his brother, concern written on his face. "No, we aren't going to play that game. What's wrong?"

"I-it feels like there are two lines cut on my back whenever the shirt presses against it… or touches it."

Hiro gently pulled the material away from his back, using the collar of the shirt to hold it away. He spotted the issue right away. The twin charcoal stripes between Tadashi's shoulder blades had begun to glow.

"Is this better?" Hiro asked. Tadashi nodded in response. "Well, we've got an issue then. These marks are probably what burned your shirt, but keeping them covered is hurting you. We can cut slits in the material for now, to relieve the pressure, but we'll eventually need something to contain it that won't hurt you."

"But what do we do for right now?" Tadashi looked back at his brother, frowning at the new problem that had presented itself.

Hiro was momentarily at a loss, before another idea came to mind. Moving quickly, Hiro brought swaths of fabric from the roll in the garage up to the room, and covered Tadashi's bed in them.

"It won't be super comfortable, but I think it's our best option for now. We'll work on comfort when we've got access to better supplies, and when it's not some ridiculous time of night."

"Okay." Tadashi yawned as Hiro carefully cut slits into the back of the shirt, allowing the relatively cool air of the room to ease the pinching heat of the marks.

"'Night, Dashi." Hiro hugged him, and he momentarily tensed, only relaxing once he realized Hiro was uninjured. Hiro ruffled his hair before making his way over to his computer station.

"'Night, Hiro." He curled up on top of the fabric, pulling one of the pieces over him to substitute as a blanket.

Once he was certain his brother was comfortable, Hiro turned his attention to the monitor in front of him. If he was going to help with Tadashi's new development, he had better get started.