Hiro could not believe what he was seeing beforehand; his own, beloved aunt growing sharp fangs, bright green reptilian eyes, and was hissing at him with a mix of hunger and sadism in her eyes. He was frozen in fear, eyes widening in shock and absolute horror. But he could react fast enough, for not even in a fraction of a second, she immediately ran, or more like blurred towards him and pinned him against the bed.

Hiro struggled as much as he could, legs moving about wildly as he tried to push her off vainly. But it was hopeless as Cass was not fazed by his struggles as she roughly grabbed his chin and moved his head to the side, while she used her other hand to pin Hiro's arm against the bed. Hiro couldn't see, but he could definitely hear her hissing, and it was coming closer to his neck. Hiro looked around in vain, and saw something sharp nearby. It was a screwdriver for when he worked on the microbots months ago.

Hiro: Ack…I'm sorry Aunt Cass!

Using his free hand, he reached out to grab the screwdriver. Once he does so, he felt Cass's breath right on top of him. Without hesitating, he quickly grabbed the screwdriver and jabbed it against her. Hiro felt his chin and arm free as Cass pulled back, her screeches of agony as she felt the pain. He quickly turned around and saw Cass backing away as she continues to scream in pain, the screwdriver hitting her deep in the left eye, causing it to bleed. Hiro flinched in pain, but soon self-preservation instincts began kicking in as he soon got up and ran from the room. Cass stayed behind as she grabbed the screwdriver, and quickly pulled it off as she screamed some more. Soon, she shook her head and looked at the stairways with her good eye, her right eye now beginning to heal itself rapidly, soon growing into a new eye. She growled in intense anger; now she's REALLY pissed off.

Hiro immediately ran through the living room as he made his way towards the stairs leading to the café. All this time, he was lost in thought and in panic mode.

Hiro: No…No, this is impossible! This can't be! T-They're not REAL. W-WHY IS MY AUNT A VAMPIRE?!

He shouted as he ran through the stairs, fearing that the monster that was once his aunt would be following him. Soon, he made his way towards the café, and saw the back door. With slight hope in his eyes, he opened it…and was greeted with a furious looking Cass, with a new eye and two long fangs baring outwards as she hissed at him.

Hiro screamed in horror as he ran towards the main entrance. Cass saw where he was going and blurred towards the main entrance, greeting him with another loud hiss. Hiro walked back as he shouted in horror, and Cass followed him inside. Hiro wasn't paying attention to where he was going, and ended up tripping over one of the café's chairs, making him fall back downwards. Cass smiled and ran over to pin him down once more. But Hiro, most likely thanks to his time as a leader as Big Hero 6, reacted quickly and rolled out of the way, making Cass grab nothing as she fell downwards.

Hiro soon got up, and quickly pulled the nearby table down upon her, in hopes of slowing down even for what little time he has left. Cass suddenly felt extra weight on her back and she looked up at Hiro. Hiro looked back at his aunt before smugging and running towards the basement doorway. Cass immediately shrieked at him as he ran inside and closed the door behind him. She immediately launched herself upwards and blurred towards the main door and outside.

However, Hiro quickly ran back inside and locked the door. He looked around in a panic.

Hiro: I...*pants* I can't get through these doors without her running towards it. All I have left is…

He looked up at the stairway, and remembered that there was an additional floor where the upstairs garden was. He could simply hide in the shed there.

*BANG*

Hiro flinched back as he felt the door behind him push forward with a loud bang, but it still remained on its hinges. With no time to spare, he quickly ran up the stairs as fast as he could through the living room, up the other set of stairs, through the hallways and into the upstairs garden.

*CRASH*

There was the sound of wood cracking in the main floor. Cass had broken through finally, and is wondering where he was. Hiro widened his eyes in a panic when he heard her yell.

Cass: Oh, Hiro! Where are you?!

Hiro's heart stopped as he ran towards the shed and quickly but quietly closed the door. He huddled back as far as he could and covered his mouth to muffle his breathing.

Cass: Oh, my dear nephew! You want to play a game of hide-and-seek? Oh I LOVE that game! Alright, I'm come and find you!

She shouted in an unsettling cheery tone. Hiro shivered to himself in fright and silently closed his eyes, praying that it will all be over soon.

Downstairs, Cass ran up the stairs, bright eyes looking around the living room, a devilish, uncharacteristic smile on her face. She then closed her eyes and sniffed the air, trying to catch a scent of her prey. Immediately, she widened her eyes and exhaled, almost moaning in ecstasy.

Cass: I can smell you, Hiro…you smell so GOOD.

She shouted at the top of her voice, before walking up the stairs, but suddenly, she was stopped by a familiar meowing. Cass turned around to see Mochi the cat, cowering underneath the couch. Cass smiled at him, fangs briefly retracting and eyes returning to normal for a brief moment.

Cass: Mochi! My dear little kitty cat.

She immediately walked over to the couch, and leaned down. Mochi could sense something was very wrong with her, and he hissed at her, swiping at her with his paw. Cass pulled her head back for a little bit, before smiling and lifting the couch with one hand, and she grabbed Mochi's collar before he could run off. Then she pulled him closer to her as she dropped the couch (which lets out a loud THUD) and held him closer to her face. Mochi hissed at her again and swiped at her, but Cass easily shrugged off the scratch, which healed almost instantly.

Cass: *chuckles softly* Looks like I'm having you as my entrée.

She smiled at her cat again before she hissed at him again, showing her long fangs and green reptilian eyes before she leaned her her head back and lunged towards Mochi's neck and bit down on the jugular, creating a crunching sound, followed by the sound of slurping and gulping. The bite force sends droplets of blood spraying outwards. Mochi screeched in agony, legs feebly pushing against Cass's shoulders as she began to make quick work of her former pet. It was only a few seconds, before Mochi's body slowed down to a series of twitches, fur and skin paling and skin crumpling inwards like a deflating balloon. Soon, Cass pulled her head back and sighed in relief, mouth covered with blood as she tossed Mochi's body down to the floor before she wiped the blood off of her mouth.

Cass: That was DEE-LICIOUS…*sigh* Now,

She looked back up the stairs, still remembering the blood of Hiro, which was MUCH tastier and purer than Mochi's. She licked both of her lips.

Cass: Onto the main course.

She then began laughing evilly as she walked up the stairs, anticipating the feeding that will occur.

Hiro was beginning to breathe heavily; he heard Mochi's scream from downstairs and assumed the worst. Now he heard her walking up the stairs leading to the garden roof, and he closed his eyes. Soon, he heard the door open; she's outside in the garden now. Hiro shivered some more as he heard her walking across the garden.

*sniff, and sigh*

Hiro heard her sniff the air, and feared that she COULD smell him. But he's inside the shed, and it's very old. With the wood in the way, there's no way she can smell him…can she?

Shortly, he heard her footsteps approaching the shed, and he held his breath.

Cass: Hmm…where are you?

He tensed up some more, and tears once more began streaming downwards. "Please don't find me. Please don't find me." Hiro thought to himself. He waited, and waited for Cass to leave, and hoped to whatever deity was up there that she would not notice him.

After about a minute (though to Hiro, it seemed like an eternity), he could hear Cass's footsteps walking away from the shed. Hiro however, remained behind; he didn't want to leave just yet. The footsteps walked further and further away, until there was the sound of the door closing.

Silence was all that could be heard for a while, and Hiro stared at the shed door. So far, he couldn't hear anything other than the sound of crickets chirping in the night. After another while, Hiro thought it was safe to come out, so he stood up and cautiously approached the door. His heart was pumping profusely, and sweat was pouring down as well. With a shiver, he made his way towards the door, and reached his hand out to grab the handle.

A cold feeling was felt upon his pam touching the handle, and Hiro moved his body closer. As he pushed down the handle, he pulled the shed door lightly, and he peeked his left eye outside. Out there was…nobody. No signs of Cass, or anybody anywhere. Soon, he slightly leaned his head outside for a better look.

He turned his head to the left, there was nobody there. He turned to the right; nothing there either. Then he looked up…nobody there either. Shortly, he silently sighed in relief as he walked out of the door, yet still in a cautious manner. Hiro finally began walking out of the shed, feeling brave enough once he learned she's gone.

Hiro: O-Okay…she's gone…for now…

He then looked down, tears streaming down.

Hiro: What the hell just happened? W-Why did…

Hiro was on the verge of crying again; his aunt is now a powerful creature of darkness, and she doesn't see him as anything but food, and now she's already killed their pet cat…The thought of what she'll do to him sends chills down his spine. Then he started shivering once more once he felt the chills…

Hiro: What am I gonna do? I-I can't…

He couldn't finish his sentence, because then he felt another chill…but this time, it went up his spine, instead of down. And the other thing about these chills; they feel more…sharper. Then,

Voice: You can't do what?

Hiro immediately recognized that voice, and his eyes widened in horror. Then he felt multiple sharp points running down his neck. Then, he felt something drawing in closer to the left side of his face.

Voice: What were you gonna say, my dear nephew?

Hiro felt his skin go cold as he turned to his left. There, he saw Cass, who was smiling at him warmly. Her fangs are gone, and her eyes are a normal green color, though there are still traces of Mochi's blood still around her lips. Hiro looked on in horror, how did she...did she trick him? Or did she somehow, blurred over behind him.

Hiro: A-Aun...Aunt Cass?

She didnt reply, but she did stroke his neck with her fingers. He remained frozen for a while as she inspected him, before she moved her face closer to the neck, before taking in a deep breath.

Cass: Hmmmm….so pure, my love.

Hiro still remained frozen, before suddenly he felt something warm and sticky going up his neck; it was Cass, and she was licking him. Then she gave him a small, quick kiss on the neck before he elbowed her and moved away before turning around. Just as he did so, he felt his throat being grabbed at tightly. He instinctively grabbed onto the arm as he was lifted up. Cass looked at him with a smug look on her face as she tightened her grip on his throat, which made Hiro choke some more.

Cass: Aww, look at you; struggling for your life, in a vain attempt to escape.

She then began giggling as she tightened her grip some more. Hiro widened his eyes in horror as he felt no air coming into his lungs.

Cass: That's a pitiful, but fun sight to see. Especially towards teens of your age.

She then pulled Hiro closer to her face. Hiro looked at this monster, right into her eyes as her grip tightened once more, no air coming into his lungs. Cass the grew a sadistic smile.

Cass: I'm gonna have so much fun eating you, Hiro!

Cass didn't hesitate as she threw him across the garden and into the glass door. Hiro landed on his back and shouted in agony, before groaning as he got up. He then turned around and saw Cass approaching him with a sinister smile.

Hiro: No. No, please Aunt Cass. I-It's me, Hiro. Your nephew!

Cass just chuckled as he limped off towards the stairs. Hiro tried his best to run off, but he soon felt his left arm grabbed and yanked back. He looked back to see Cass smiling at him. She then dragged Hiro back into his room. Hiro tried to pull back, but she was too strong and she only tightened her grip on his arm, making him wince.

Cass: Aww, back to square one.

Hiro heard her speak once they arrived up the stairs and at the room. He couldn't have time to react, as she soon threw him towards the middle floor of the room, making him grunt in pain again.

Hiro: Oww…

The sound of pain did not faze Cass, as she looked on at him with a grin, before she approached him. Hiro looked at her with tears in his eyes, and made one last attempt to plead with her.

Hiro: A-Aunt Cass…please…it's me, Hiro Hamada. I'm your nephew…*sobs* Please, I beg of you, Aunt Cass. Please, I love you…

Cass looked at him as she walked over to him, and gave a smile.

Cass: Oh, Hiro…I love you too, my dear nephew.

She then leaned downwards and grabbed one of his feet and pulled him towards her. Hiro whimpered in horror as she soon saddled on top of him.

Hiro: P-Please, I beg of you, Aunt Cass. Please…

He feebly raised his hands to cover his neck, but Cass simply grabbed both of his wrists and pinned them against the hard floor. Now he was completely defenseless; his legs were flailing uselessly as she saddled on his hips to keep him down, and both of his arms were also pinned, the gripping of her hands actually hurting, almost crushing the wrists.

Cass: I hear you, Hiro. It's just that…I'm not gonna be the aunt that you know and love anymore, this'll be the new me…and for my new life to begin…I have to get rid of you, my dear...

Hiro widened his eyes in horror, tears continuing to stream down as she laughed some more.

Cass: Don't worry, Hiro…I'll make this as slow and as painful for you as possible…

Cass then reared her head back, and she made a loud screeching nose, before her face began to change; her jaws began to stretch to the length of a human shoulder, veins began to grow more visible, her eyes now becoming pitch-black holes, and instead of two long canines, all of her teeth became sharper, with extra small teeth protruding from the blackened gum. The corners of her lips pulled back to reveal a pink jaw membrane like a snake as well. She then looked down at Hiro, who was now terrified with the new, distorted and demonic look on her face. He then heard her lets out a loud, high-pitched screech as she began leaning forward towards his neck, the monster taking her time and enjoying every last moment of her prey's fear.

Hiro looked away and with tears in his eyes, he closed them and began screaming in horror.

Hiro: AAAAAAAAHHHH!

As she leaned in closer, Hiro then tried desperately to plead with her once more.

Hiro: PLEASE! I'M YOUR NEPHEW! PLEASE!

His pleas fall on deaf ears as she leaned in closer. Now Cass was just about on top of his neck, and she was about to sink them into the flesh, and taste the pure blood.

Hiro: NO, STOP! STOP PLEASE MOMMY!

Hiro then tightly shuts his eyes, and tensed up, preparing for the last moment of pain in his life, immediately thinking about his life before hand; about being with his friends, his life as a secret superhero, his moments with older brother's creation Baymax, playful times with Tadashi himself, and lastly, the tender moments with his own, beloved Aunt Cass. He wanted them all to be the last things he sees before dying.

But strangly, there was no white pain…no sound of flesh being torn…and no feeling of your body being drained of blood. Instead, there was silence. Hiro slowly opened his eyes, and gently turned his head to where he can at least see the back of his aunt. He felt her sharp teeth just barely touching the pulse point of his neck, just about to pierce the flesh. He then felt Cass breathing rather heavily as she slowly began pulling her head back. Hiro then saw the demonic looking face of the beast, but instead of a sadistic look…instead, it was a look of confusion and shock. Now, her eyes began to grow to normal, familiar looking green eyes. Then, she looked down at Hiro as her face (teeth and all) began to contort back to normal.

Cass: H-H…Hiro?

Hiro looked back at her, and was shocked. W-Why didn't she kill him? Cass began panting, as she immediately got off of him, and pulled back. Her eyes had confusion in them.

Cass: W-What happened? I-I…

Cass was very confused; she had no idea what happened before. It all went by so fast…but the more she looked around, she saw the bloodied screwdriver, the small mess of the room, and the red bruises and black chock marks around Hiro's neck. Then…it all came back to her; her first attempted biting of Hiro, the death of Mochi, and her just a moment ago…Cass widened her eyes upon the memories as they began to burn into her mind. Soon, she began to shake as she looked at a frightened Hiro.

Cass: H-Hiro…I…I'm SO sorry, baby. I-I would NEVER hurt you, I swear! I-I don't know what happened. I just…

Now she broke down into tears, hands covering her face at the horrible realization of what she had done. Hiro looked on in pity and sadness. Despite what she did earlier, this person is still his AUNT, the woman who took him and Tadashi in when they had nowhere to go and raised them like a mother would. He can't just give up on her; now that she's back to normal, he can try to help her.

Hiro: A-Aunt Cass?

He slowly climbed to his feet and began approaching her. But Cass heard him and shouted,

Cass: NO! Stay away from me!

Hiro flinched back at her tone and froze there for a bit as he saw the blood-shot eyes of Cass as she looked at him.

Cass: Don't come any closer to me, Hiro. I-I'll hurt you…

Hiro then shook his head.

Hiro: No, Aunt Cass. I'm gonna help you out, you hear me? W-We can fix all of this.

Cass: WHAT?! How can YOU fix everything I'VE done?! I've killed our family pet, and I've tried to KILL you, Hiro! I'm a MONSTER, now! Don't you get it?!

Hiro: I can change you back into a human! Please, let me try and help!

Cass shook her head.

Cass: You think doing that's gonna change what I've done, Hiro Hamada? As long as I have those memories in my head, I'll always be a monster!

Hiro grew more and more upset at her yelling, but deep down, he knew she was right. What happened can't be undone; Mochi's dead, and he almost got bitten. Suddenly Cass stood up, making Hiro flinch back instinctively.

Cass: I can't stay here, Hiro. I have to go.

Hiro then widened his eyes in horror as she made her way to the stairs, and immediately shook his head.

Hiro: N-No, please Aunt Cass! Please don't go! We're Hamadas; we never give up on anything, not even each other! Please!

Cass then turned around, and stared at Hiro for what could be the last time…

Cass: I'm sorry, Hiro…I'm too dangerous to be around you, and even like this,

She said that in a venomous tone, describing her now cursed existence.

Cass: I still want you to grow up and be safe…I can't hurt you anymore…

Hiro then began to cry out of sorrow and sadness. Cass then gave him a smile, but this time; it was a warm, motherly smile that Hiro wanted to see.

Cass: Hiro…I love you…very much. Remember, back when you were 7, and you asked me whether I've completely forgotten about your mom and dad?

Hiro looked at her, and nodded while gulping.

Hiro: Y-Yes…

Cass: Hiro, deep in your heart…I'll be by your side…guiding you…

Hiro then shook his head stubbornly.

Hiro: NO! I won't let that happen, Aunt Cass! P-Please…don't go…

He began to lose feeling of his legs, and he fell down, now on all fours.

Hiro: I've lost Tadashi, I've lost my mom and dad…I've lost EVERYONE in my family but you…please…don't go…

Hiro looked at her with pleading eyes once more, and was barely able to keep himself from sobbing. Cass grew a grieving look.

Cass: I'm sorry, Hiro.

Hiro then grew sadder than before, but then Cass gave him another warm, caring smile.

Cass: Hiro…ever since your mother gave you and Tadashi to me, you two have been nothing but pleasant treasures in my whole life, and are far sweeter than any cake I've baked in my life…I'll always remember the good times we had together…always…

She then blew a kiss towards him.

Cass: Good-bye…my son…I love you…

Hiro's heart shattered into a thousand pieces when he heard her call him 'son' instead of the usual 'nephew', and he could only sit there and watch as Cass ran out of his view, then he heard the main door to the café open and close…then, silence…Hiro then started to feel his legs again, and once he did so, he ran towards his bed, ducked his head into a pillow, and just screamed. And he screamed, and screamed, and screamed loudly. He felt hot tears streaming downwards as he continued to sob loudly. Losing Tadashi was terrible enough on its own; but at the very least, it was very quick and Hiro didn't get to actually SEE his body vaporize instantly in the explosion. But Cass, he watched her become a monster, and leave him before his very eyes is even worse, and he had to see it all. He couldn't imagine living a life without Cass. He needed her, and he could tell she needed him as well.

For a long while, he simply cried into the pillow, and remained like this for a long time. Had it not been for a gentle pat on his head, he likely would've cried himself to sleep. He looked up to see who was patting him, it was his personal healthcare companion, Baymax.

Baymax: Hiro, what seems to be the trouble?

Hiro smiled at him through the tears as he sat up.

Hiro: L-Listen, Baymax…Aunt Cass is now a vampire.

Baymax looked at him, head tilting.

Baymax: I have scanned your aunt.

Hiro looked at his stomach, which began to show the video recording of Cass from a moment ago, having pinned down and was almost successful in biting him. Baymax stated,

Baymax: I believe that the virus that made her ill may have caused this new change.

Hiro looked at Baymax, and realized the connection between the two. He widened his eyes, and groaned to himself, shaking his head.

Hiro: You're right, buddy. B-But how is that possible? How did they even get there?

Baymax then raised a finger.

Baymax: I've also recorded an intruder entering your room.

Hiro looked at him in confusion, before he saw the screen. In it, he saw a man in his late 40s, blurring into the room, before he walked downstairs into the living room. Hiro widened his eyes, and clenched his fists in anger of this…monster that turned his aunt into a demonic monster…He then sighed to himself.

Baymax: Where is your aunt now?

Hiro looked at her.

Hiro: She's gone. I want to help her, though. Aunt Cass has NEVER given up on me or Tadashi in her life. Despite how much stress I put her in; she comes out on top and loves me regardless. And now,

He jumped out of bed.

Hiro: I'm not gonna give up on her. Baymax, where is she now?

Baymax looked up, and there was a series of beeping sounds, before he looked down.

Baymax: She's out in the Golden Gate Park at the outskirts of the city in the southwest.

Hiro looked at the map, and widened his eyes.

Hiro: Damn, she's that fast…okay.

He closed his eyes, and sighed to himself before he looked at Baymax.

Hiro: Baymax, suit up buddy. We're gonna get her back.

He grabbed Baymax's hand and dragged him through the living room.

Baymax: Will helping you find you aunt improve your emotional distress?

Hiro nodded.

Hiro: Yes. Yes it would. Come on, buddy.

He then walked over towards the garage, passing by the living room, and passing by Mochi's body, which was once tubby and fat, now skinny and exposing some ribs and edges of the skull. Hiro looked away, now's not the time to mourn for him yet. His aunt is a bigger priority now.

Soon, he approached the garage, which was still intact despite the door's destruction. He sighed in relief and he approached a secret doorway, leaving Baymax behind and he himself walked in.

Now, both of them soon got themselves suited up; Hiro with his purple suit and Baymax with his giant red flying suit. He then turned towards his robotic pal.

Hiro: Ready, pal?

Baymax looked down at him.

Baymax: Your needs are top priority. Of course I'll help you, Hiro.

Hiro nodded as he climbed up behind Baymax as he waddled out of the garage. Using his magnetic gloves and kneecaps, he attached himself to Baymax's back.

Hiro: Fly, Baymax!

Baymax then expanded his wings outwards, and his rocket boots activated before they were launched upwards and are now flying into the skies of San Fransokyo, wanting to search for Cass, and get all of this fixed and solved, even if he has to die doing so…