Yes, in some fanfictions, Sans is often given human characteristics or re - imagined as a human. This allows for different interpretations and storylines that deviate from the original non - human character in the game. It gives creators a chance to explore new relationships and scenarios with a more human - like Sans.
One common element is the exploration of human emotions. Since Sans is now human, he can experience things like love, jealousy, and fear more relatable to human readers. Another element could be his new physical appearance and how it affects his interactions. For example, he might have to deal with things like getting tired or injured in a more human way.
Papyrus would be a great addition. His relationship with Sans could take on a whole new dynamic when Sans becomes human. Papyrus might be overprotective at first, not sure how to deal with his now - human brother. He could also be a source of comic relief as he tries to understand human behaviors.
Maybe in the fanfiction, there's a scientific experiment gone wrong. A human scientist was trying to find a way to bridge the gap between humans and monsters. Sans, being a curious skeleton, volunteered to be a part of the experiment. However, instead of just creating a connection, the experiment transforms Sans into a human. As a human, he experiences new emotions more intensely, like hunger and fatigue, which he didn't really have as a skeleton. He then uses his new human form to try and convince other humans that monsters are not to be feared.
Well, one possible plot could be that Sans discovers a mysterious magic spell or artifact that gradually transforms him into a human. As he changes, he has to deal with new sensations like feeling pain and hunger in a more intense way. He also might struggle with how other characters in the Undertale world view him now that he's different.
It could be another monster who is jealous of Sans' new form. This monster might feel that Sans is getting special treatment or opportunities because he's now a human. So, this jealous monster tries to find a way to either turn Sans back into a skeleton against his will or make his human life miserable by causing trouble for him in the human world, like spreading false rumors about him.
One idea could be a crossover where Sans from the game enters a human world during a major historical event like the Industrial Revolution. He could interact with inventors and workers, his magic and unique personality causing all sorts of comical and thought - provoking situations.
First, you need to establish the characters. Describe Sans' personality, the human's character traits, and the mutt's appearance and behavior. For example, Sans could be laid - back and the human could be more energetic. Then, plan the date. Decide where they will go and what they will do, like if they go to a beach and the mutt runs around on the leash while they talk.
One idea could be that the human finds a stray mutt and Sans helps take care of it. They go on a date to the park with the dog on a leash. The human could be nervous about the date, but Sans' easy - going nature and the dog's antics make it a fun and memorable time.