( Sorry, it's been a long while since I updated this book. I had writer's block and I also was busy with other stuff in my life. Anyways, I hope you would enjoy this story. I would also try to update more often. I'll be writing more stories. Sorry for the over-used puns in this story. I'm not good with making puns. Anyhow, which story would you like me to write next? Rwby? Kuroko no basket? Attack on Titan/ Shingeki no Kyojin? Creepypasta? Or a Book Of Theories? Comment in the comments section below. Before I forget, please tell me if I have made any grammatical or punctuation errors. Stay awesome!
- Velenka )

It was Sans' first day of work and he was having breakfast. He was not very keen on having a job at first but after some thought he decided to become a teacher. However, he was not just some average teacher. He was a part-time substitute teacher teaching at his neighbourhood school.

Becoming a teacher was not very difficult for Sans as he was a fast learner. He also had the patience, confidence and passion to become a teacher. But because of his laziness, he was found sleeping on the job. In reality, Sans did not have to do much as a part time teacher. In fact, he was more of that substitute teacher that only makes sure that the class does not disturb him or cause any trouble with anyone else especially Frisk.

"Ah! That was such a delicious plate of spaghetti. I actually prefer a burger. It seems that you've 'mustard' the art of cooking spaghetti." said Sans. "Do you think I, the great Papyrus, who let you ruin my morning? Of course not! Nyeh Heh Heh!" Papyrus replied.
"Bye. I'm going to work spaghetti 'mustard'."
"SANS!"
"Bye!"

The school was not very far from his home and it would only take Sans fifteen minutes to reach his destination. But, Sans teleported there instead as he wanted to take a short cut. There were not many students in the school yet. Sans made his way to the classroom he was assigned to. That was also the class Frisk was in. Frisk informed Sans that their class was extremely rowdy and rebellious. 'I suppose won't be very boring then. But I can't really be bothered.' Sans thought to himself. Oh how wrong he was.

When the bell rang students swarmed the corridors going to their respective classes. There were many students in Sans' class, there were forty students in total and everyone was present in school that day. "Well then class, I'm Sans, your substitute teacher." "Good morning teacher." The class except Frisk  unenthusiastically replied. "So, you can all do self-studying, if you need help just tell me." Sans told the class. "WHAT? We can't use our phones? What kind of teacher are you? Whatever. Monsters sure suck~"

Sans turned his head to the direction of the voice. It came from a young boy with fair hair and dark eyes. He was wearing a black T-shirt saying "What are you looking at punk?" in huge white block letters and navy blue jeans. He was looking at Sans with disgust. "Hey, what's your name kiddo?" asked Sans. He was curious to if this boy would make his first day at work interesting. "Name's John. Got a problem skelly?" answered John rudely.
"You monsters know you have no right to step foot into our territory right? You're worthless! I doubt you even have a brain. It probably rot away or something."
"Hey, kid-"
"I'm not a kid! Call me that and you have broken bones!"
"Well then, it seems that I have to pun-nish you."
"I hate puns! Worst teacher ever! How did even you get hired in the first place? You know what, why don't you do yourself a favour and get lost, no one likes you apart from your stupid family and friends!" Sans felt anger boiling inside of him but he did not hurt John, yet.

Frisk was horrified when John just acted rudely to Sans. They know what happens when someone makes fun of Sans' family and friends. Those people would have a bad time. It would be bad, very bad. To the point you wish you would beg Sans for mercy until you loose your voice. But before that you would have died from blood loss so there was no need to beg for mercy. Frisk hoped John would not do any more foolish deeds. The class on the other hand wanted to see John play with Sans' patience. They were curious to see how would Sans react.

Not much happened in the last few hours apart from telling the class to keep their noise level down. Sans was grateful that John did not stir up any trouble. The class apart from John started to like Sans a little. Sans was not unreasonable like the other teachers and he even released the class ten minutes early for lunch. Despite napping most of the time, the class did not draw on Sans face which surprised him a little. Frisk was puzzled John had not done anything to Sans yet. 'John must be planning something big.' Frisk thought to themself.

Finally, school was over for the day. Sans packed his stuff and got ready to leave the classroom. Just as he was about to leave the classroom, someone poured water over him. That person was none other than John. He was laughing hysterically at Sans, he also took some pictures. 'I wonder how many likes I would get on Instagram.'  John thought to himself. Sans had enough, he decided to teach John a lesson that he would never forget. It was time for a bad time.

John was suddenly teleported to the school gym. "What the!" John exclaimed loudly. He had no idea what happened and he was panicking. "Hey." said a familiar voice, the voice belonged to Sans. "W-what's h-happening?" John stammered. "Just giving you a bad time kiddo. You know what happens to bad kids don't cha?" Sans calmly replied.  John looked like a cowardly lamb when he heard what Sans said. Just as much as he  hated seeing people suffer, he did not have any other way to teach John a lesson he would never forget. Sans knew talking would be useless so he had to use actions instead.

Sans used his telekinesis ability to lift John off the ground, John began to spin. John felt dizzy and he almost vomited on his red converse sneakers. John wanted Sans to stop so he tried yelling. But no sound came out, only a soft croak. John began to realise his mistake. He should not have disrespected Sans. None of this would have happened if he had been more sensible of his actions. Sans felt he had punished John enough so he slowly stopped spinning John. John was looking green and he looked ready to vomit. Sans quickly handed him a plastic bag to vomit into. After John relieved himself he sincerely apologised to Sans for the hurtful words he said. Sans could tell John was sincere and he accepted the apology. Sans knew that John would learn his lesson so he did not have to go too harsh on him. Sans and John became acquainted on that day and John became more respectful towards his seniors and monsters all thanks to Sans.

Sans enjoyed his first day of work and he continued to be a substitute teacher for the school. He was also an expert on disciplining students who misbehaved. Papyrus was proud knowing that his brother was working. However, he does not know the fact that Sans sleeps on the job. For that, it would be wise to keep it a secret.

The End