'And so, Fluffy Bunny lived happily ever after.'

W.D. Gaster closed the book and looked to the young, 10-year-old skeleton in the bed he was sat by. He was fast asleep.

'Goodnight, Papyrus,' Gaster said, standing and leaving the room. He shut the door quietly and looked down the hall. Young, 12-year-old Sans was just leaving the bathroom, wearing his blue pyjamas, the trousers of them decorated with a Gaster Blaster pattern.

Gaster couldn't help but notice that Sans looked exhausted and very sick. 'Sans are you feeling okay?'

'i'm fine,' Sans replied, even though he didn't look it.

'Do you want me to tuck you in?' Gaster asked.

'nah, i can do it myself,' Sans said, opening the door to his room. 'night, dr g.'

Sans went into his room, locking the door behind him. Why? Well, when he was 7, there was a rumour going around his class that, if you didn't lock your bedroom door at night, a human would come into your room, kill you and take your soul. Of course, Sans found out it was bullshit a few years later but by then he'd gotten into the habit of doing it.

He kicked off his slippers and, as he did, he felt a tingling in his right arm. He pulled up his pyjama sleeve and looked at it. Nothing looked abnormal. Well, unless you counted the bite. It was just there, reminding him of that horrible night. Come to think of it, it had been exactly one month since it had happed, even though to Sans it felt like it had just happened yesterday.

He pushed the thoughts from his mind and slipped into his bed. He closed his eye sockets and prepared to fall asleep...until a strange feeling shot through his body. He sat up, wondering what it was. Then he saw his hand was trembling. Actually, his entire body was trembling.

'what the- AAAAAAAAHHHHHHH!' Sans let out a scream, and fell off his bed. extreme pain was shooting through every single part of his body. 'SOMEONE HELP ME! AAAAAHHHH!'

Suddenly, he felt something sharp poking his tongue. He saw his reflection in the mirror on one of the doors of his wardrobe. He saw what was poking his tongue; fangs had appeared in his mouth. He could also see everything else that was happening to him. His fingers were growing into sharp claws and his limbs were getting longer. His spine was hunching, tearing his pyjamas.

'WHAT'S H-HAPPENING TO M-ME!? AAAAAAAAHHHHHHH!' Sans screamed as a hole was ripped open on the back of his trousers as a tail grew from the back of his pelvis and pushed through the fabric.

In his room, Papyrus was jerked awake by the sound of screaming.

'SANS?' he said. He heard another scream. 'SANS!'

He jumped from his bed and ran from his room and down the hall.

'SANS, DO NOT FEAR, THE GREAT PAPYRUS IS COMING TO HELP YOU!' he yelled as he ran. He came to his brother's bedroom door and tried to open it. Locked. Sans screamed again. 'D-DO NOT WORRY, BROTHER! THE GREAT PAPYRUS WILL FIND A WAY IN!'

He created a bone attack and was about to break down the door when...

'Papyrus? What's going on?' Gaster asked, coming up the stairs. 'I heard screaming.'

'S-SANS, HE- ' Papyrus began but was interrupted by another scream. This one was different from the others. It started off as an ordinary scream but then changed into a howl.

'AAAAAAAAAAWWWWWWOOOOOOOO!'

'Papyrus, get away from there!' Gaster said. Papyrus backed away from the door. Gaster went up to it. He pulled a spare key from his pocket.

Please tell me I'm wrong, he thought to himself as he unlocked the door and pushed it slightly ajar. Peering inside, he saw not Sans, but a beast. A werewolf.

He quickly pulled the door shut, locked it and created two walls of bones blocking it.

'Papyrus,' he yelled, 'sound the alarm! Evacuate the lab immediately!'

'WHY?' Papyrus asked. 'WHAT'S GOI- '

'I said NOW!' Gaster yelled.

Papyrus ran down the hall and down the stairs. Gaster leant against the wall, still in shock.

He still couldn't believe what he's just seen.