Five weeks later after the funeral Hiro is still down of his brother not being around anymore. He only eats a bit of his food and some water which worries Cass. Sebastian visits Hiro everyday to check on him but it's always the same with him. He doesn't talk much or go outside for fresh air.

"Hey, Hiro." Hiro looks over to the stairway to see Sebastian walking in.

"Hi, Sebastian." Hiro said to him quietly giving him a weak smile.

"How you feeling?" Sebastian asked walking up grabbing a chair and sat in front of him. Hiro shrugged his shoulder to give him a answer.

"Hiro, you shouldn't suffer with the lost of your brother. You know he wants you to make him proud of joining SFIT." Sebastian said trying to comfort him.

"I know Sebastian but it won't feel right without him there." Hiro explains.

"My brother would wanted me to keep going in life. I try to make him proud everyday with his inventions he made blue prints and I go hiking for him too. Tadashi would want you to carry on with your life, Hiro." He mentioned causing Hiro to look down and he grabs his robot and looks at it.

"Hey sweetie." They look and saw Cass with a plate of food for Hiro.

"Hey, aunt Cass." Hiro says putting his bot away.

"Mrs. Matsuda is in the café. She's wearing some super inappropriate for a eighty year old." Cass comments as Hiro smiled and Sebastian laughing slightly.

"That always cracks you two up. You should come down, Hiro." Cass offered him.

"Maybe later." He declined

"Oh, the university called again. It's uh, been a few weeks since class started. But they said it's not too late to register." She told him showing the letter.

"Okay. Thanks... I'll think about it." Hiro replied to her softly.

Cass sighed as she walks up to Sebastian and she whispered in his ear "Take care of him."

"I will. you have my word." Sebastian said to her and she nodded and went down stairs.

Hiro walks over to his computer as he turns it on by moving the mouse. Just then, Hiro gets a video message from someone and Sebastian gets up walking over to him. He clicks the video message and saw Go Go, Honey Lemon, Wasabi and Fred.

"Hi Hiro." They all said to him at once.

"We just want to check and see how you're doing." Honey Lemon said

"Wish you were here, buddy." Wasabi said to him.

"Hiro, if I could only have one super power right now. It would be a ability to crawl through this camera and give you a big hug." Fred replies to him.

Hiro stops the recording from there and shut off his computer. He grabs the letter off the table as he looks at it and he threw it away in the trash can.

Sebastian smirks at this but when Hiro wasn't looking he picks it up out of the trash can and put it in a spot where he can only find it for Hiro.

Hiro then grabbed his robot but one of the piece fell landing on his foot. Hiro groan in pain as he sat on his bed trying to ease the pain down.

"You alright, kiddo?" Sebastian asked him concerned.

"Yeah, fine. Ow!" Hiro said to him trying to down the pain.

Then they heard a beeping noise as they looked over to Tadashi's bed side to see Baymax staring at em. Baymax walks off his charging station walking over to them carefully squeezing near the bed and the dresser but accidentally knocking some books down and walks over to them.

"Hello. I am Baymax your personal healthcare companion." Said Baymax

"Hey, Baymax I didn't know you were still... active." Hiro said to him.

"Hello, Baymax." Sebastian replied to him with a smile.

"Hello, Sebastian." Baymax said to him.

"I heard a sound of distress. What seems to be the the trouble." Baymax asked him.

"Oh. I just stubbed my toe a little. Im fine." Hiro said to him.

"On a scale of 1 to 10. How would you rate your pain?" He asked Hiro.

"A zero. I'm fine really."

"I'm thinking more of a two." Sebastian says cause of the noise Hiro made when the robot part landed on his foot.

"Sebastian, I'm fine." Hiro clarifies to him.

"Sure you are."

"Does it hurt when I touch it?" Baymax asked bending down trying to touch hiro's foot.

"No thats okay. No touching I'm, agh!" Hiro said as he trips over a tool box and fell in a small space between his bed and worktable.

"You alright?" Sebastian asked him.

"Yeah. Ow."

"You have fallen." Said Baymax looking down at Hiro.

"Ya, think?" Hiro answered and he tries to get up by grabbing the stand on the wall as it broke and stuff that was on it is sliding off.

"Ow!"

"On a scale of 1"

"Ow!"

"On a scale of"

"Ow!"

"On a scale."

"Agh!"

"On a"

"Ugh!!"

"On a scale of 1 to 10. How would you rate your pain?" Baymax asked his patient.

"Ugh. Zero." Hiro said to him in a dazed voice.

"I think it's a four." Sebastian mentioned shaking his head with his head.

"Not helping!"

"It's alright to cry." Baymax mentioned as he leans down picking up Hiro.

"No, no, no, no."

"Crying is a natural response to pain." Baymax explained to Hiro as he picks him up like a baby and Sebastian finds it cute.

"I'm not crying." Hiro said as he got off of Baymax

"I'll scan you for injuries."

"Don't scan me." Hiro told Baymax pointing his finger at him.

"Scan complete." Baymax Said

"Unbelievable." Hiro waved his arm back in defeat.

"Just leave him be Hiro, he does that." Sebastian said to Hiro.

"You have sustained no injuries. However, your hormonal and neurotransmitter levels indicate that you are experiencing mood swings, which are common in adolescents. Diagnosis: Puberty." Baymax explains to him.

"Woah what? Okay, time to shrink now." Hiro said to him a bit freaked out.

"You should expect an increase of body hair. Especially on your face, chest, armpits, and- m-" Baymax got interrupted as Hiro brought his charging station over to him.

"Thank you! That's enough." Hiro replies and tried to push Baymax into his pod.

"You may also experience strange and powerful new urges." Baymax explains as Hiro tries to put him back in his charging station.

"Okay. Let's put you back in your luggage."

"I cannot deactivate until you say 'you are satisfied with you care." Baymax told him.

"Fine I am satisfied with my, woah!" Hiro was about to say but Baymax tips over causing them both to fall on the ground.

"You alright?" Sebastian asked concerned.

"Yeah. Wait a second." Hiro said to him as he grabs his jacket underneath his bed. He digs in his pocket to find his microbot moving.

"Is that your microbot, Hiro?" Sebastian asked him confused.

"Yes. But this doesn't make any sense." Hiro said as he gets up looking at it.

"Puberty can often be a confusing time for a young adolescent flowering into-" Baymax was about to finish but got interrupted by Hiro.

"No. The thing is attracted to the other microbots." Hiro explained.

"That's impossible they were destroyed in the fire." Sebastian said to him.

"Yeah, they were. Something's broken." Hiro replied putting the microbot in the small container and he sits on his chair fixing his robot.

Baymax then looks at the microbot as he looks at and it was hitting the side of the container. He picks it up as he moves around with it and it was turning like a compass.

"Your tiny robot is trying to go somewhere." Baymax said to Hiro.

"Oh, yeah? Well why don't you go find out where it's going to go." Hiro said and Sebastian notice a uncaring voice which he narrowed his eyes at Hiro.

"Would that stabilized you pubescent mood swings?" Baymax asked him.

"Uh Huh, absolutely." He said to him as he was fixing his robot.

Hiro is working on his robot as Sebastian is on his phone playing a game until they heard the bell chatter on the entrance door and they looked up and saw that Baymax isn't in the room.

"Um, Baymax?" Hiro asked wondering where he was.

"Uh, where did he go?" Sebastian asked Hiro as he looks around the room.

"No idea." Hiro said but then they heard tires squeak outside and they ran over to the window.

Hiro pulled the blinds up as they both saw Baymax in the middle of the street with the microbot in his hand.

"What!" They both yelled as Hiro grabs his jacket and Sebastian follows behind him.

They were about to run out until Cass came out of no where stopping them from what they were doing.

"Hiro, Sebastian?" Cass asked them confused and glad to see Hiro out of his room.

"Hey, aunt Cass!" Hiro gave her a fake smile.

"Wow your up." She said proudly.

"Yeah, I figured that it was time." He said to her as he looks out the window to see Baymax moving away.

"Are you registering for school?" Cass asked him.

"Yes he is. But we got to hurry though or it will be too late." Sebastian covered Hiro.

"Oh, honey that's so great!" Cass replies and hugged her nephew.

"Special dinner tonight. I will whip up some chicken wings, you know the hot sauce that makes our faces ted." She continues.

"Sounds great, but we really have to run." Hiro told her opening the door.

"Great! Last hug." Cass said pulling Hiro into another hug.

"Take care of him, Sebastian." Cass said to him which he nods smiling and the two starts running off after Baymax.

When chasing Baymax around the city they finally saw Baymax stop at a abandoned warehouse. They ran over to him and they stopped behind him out of breath.

"Man, Baymax for a robot you sure do move quick." Sebastian comments as he was trying to get his breath back.

"Are you crazy! What are you doing?" Hiro asked him.

"I found where your tiny robot wants to go." Hiro said to him.

"I told you it's broken. It's not trying to go any..." Hiro was about to finish as he grabs the bot from Baymax's hand and saw it was moving quickly. Hiro grabs the chain on the two doors to see them looked.

"Locked."

"There is a window." The two looked up to see the window Baymax was suggesting and the two looked at each other and nodded.

Sebastian jumps onto the cargo bins as he helps Hiro up and Hiro and Sebastian helped Baymax up as well. Sebastian jumps onto the ledge where the window is as he looks around inside first before heading in.

"Coast is clear." Sebastian told them lifting himself up and he turns around to see Baymax on top of Baymax to reach Sebastian's hand.

"Please exercise caution. A fall from this height can lead to bodily harm." Baymax told him and Hiro jumps from in his head grabbing Sebastian's hand.

"Man your light." Sebastian joked causing Hiro to shake his head.

They looked around the warehouse where they were standing and they saw a lot of old machines. Just then they heard Baymax as they turned around to see him stuck.

"Oh no." Baymax said as they shush him to keep quite.

"Excuse me as I let out some air." Baymax said as he let out some air that sounded like a balloon. The two looked at each other then back at Baymax.

"Are you done?" Hiro asked him but he let out one air.

"Yes." Sebastian and Hiro pulled him.

"It will take me a moment to re inflate."

"Alright but stay quite buddy." Sebastian said as Hiro and him walked down stairs to figure out what's disturbing Hiro's microbot.

They walked into the warehouse a bit but when they turned the corner they saw something moving down the hall covered by plastic wrap. Sebastian looks around as he spot a small broken pipe as he picked it up off the ground.

Sebastian turns over to Hiro who was carrying a broom. It didn't bother him cause his mentor says that every item you find can be a weapon. They walked closer to it to see moving but it wasn't a person, just machines making something and putting it on the conveyer belt.

They turned to the right as they saw microbots on the conveyer belt moving into a barrel below and the two walks over to it.

Their eyes widened to see a lot of microbots in the barrel and Hiro dig his hand to hold and examine it.

"My Microbot?" Hiro asked confused.

"Uh, Hiro you need to see this." Sebastian said to him and he drops the microbots that was in his hand as he looks in front of him to see thousands of barrels filled with them.

"Someone's making move." Hiro said as he tries to figure out why.

"Hiro, Sebastian." They jumped from the voice as they turned to see Baymax.

"You gave us a heart attack!" The two said at the same time.

"My hands are equipped with defibrillators. Clear!" Baymax replies charging his defibrillator hands.

"Stop, stop stop stop!" Sebastian yells raising his hand up.

"It's just an expression." Hiro clarifies

Just then they heard crackling noises that sounds like bees as they tried to figure out what the noise was.

"Oh, no." Baymax said as they look to their left to see a lot of Microbots coming out of the barrels.

"Oh lord." Sebastian said starring at them in surprise.

"Run!" Hiro yells as Sebastian follows him but they stop to see Baymax walking not running.

"Oh, come on!"

"I am not fast." Baymax mentioned to them as the two grabs his hands.

"Yeah no kidding!" The two said to him as they went over to the two doors.

"Kick it down!" Hiro told Baymax. He did but nothing.

"Uh, punch it!" Sebastian told Baymax as he did but to no avail.

"Ugh!" They groan but Sebastian realized the opened window.

"Hiro, the window!" Sebastian said to him.

"Right. Let's go Baymax!" They ran from the microbots making their way over to the window and they went inside a machine as Hiro was about to close it but they got pushed back onto the ground.

Baymax fell into a little hole under the ground as the two forced him in and they went in as they start to find another way out.

Sebastian spots a hold up ahead as he told the two "This way you two!"

Sebastian climbs out the hole first as he helps Hiro, and Baymax out. They were about to run again but the microbots underneath send them flying into the air Landing onto the catwalk.

"Ugh, that one hurt." Sebastian said laughing.

"The window is right there!" Hiro yells as Sebastian gets up grabbing a metal bar what was on the catwalk.

"I'll keep it busy until you guys escape!" He told them.

"What? No!" Hiro said not wanting to lose his friend.

"Don't worry I'll catch up!" Sebastian tells him and he nods as he tries to get Baymax into the window.

"Suck it in!" Hiro told Baymax cause he was stuck into the window pushing him out as Sebastian heard Hiro screaming while holding it off.

Sebastian was about to run but he gets surrounded by microbots but he jumps to the other catwalk beside him. Sebastian ran towards the window in full speed towards it. He shattered the window and he rolled when he hit the ground.

"Sebastian!" Hiro yelled to him running over.

"Let's get outta here!" He said and they start to run five blocks as they went into an alley to catch their breath.

"Are you guys alright?" Sebastian asked them trying to get his breath back.

"Yeah, how about you?" Hiro asked him.

"I'm alright just out of breath." Sebastian said smiling.

"We should tell the police about this." Hiro said to him.

"They probably won't believe us, but worth a try." He told Hiro but then he heard his phone go off as he brings out his phone and saw it was a message from Go Go.

"Where are you? I need your help at SFIT." She asked him.

"I forgot about that. Don't worry I'll be there soon I was helping Hiro with something." He texted back and he puts his phone back into his pocket.

"Sorry kiddo, but I gotta go help out Go Go at SFIT. I'll see you later alright." Sebastian said to him.

"No problem I got it. See you Sebastian." Hiro said to him and Sebastian ran to the school cause his bike is at Hiro's house.