One great idea for a fanfiction could be a story where Underswap Sans and Underswap Papyrus go on an adventure in the Underground. Maybe they encounter a strange new monster that no one has ever seen before. They have to use their unique abilities to figure out how to deal with this new threat.
Personally, I don't recommend seeking out lemon fanfictions as they usually violate the ethical and appropriate boundaries. But if you really want to explore fan - made content about Underswap Sans and Papyrus in a proper way, try looking at fan - made comics on platforms like DeviantArt. You might find some interesting interpretations of their relationship that are more suitable for general audiences.
A plotline could be that they discover a hidden part of the Underground. This new area could have different rules and strange creatures. They have to adapt quickly to survive and also figure out how this new place relates to the rest of the Underground.
Common themes include loyalty. They are extremely loyal to each other in most fanfics. Another one is the theme of overcoming challenges. Whether it's dealing with other characters or facing difficulties in their world, they work together to overcome them. There's also the theme of fun and humor. Their interactions are often filled with jokes and light - hearted moments, which makes the fanfics enjoyable to read.
There's also 'Swap Brothers' Bond'. This fanfic delves deep into the brotherly bond between Sans and Papyrus in the Underswap setting. It shows their daily adventures and how they support each other. The author does a great job of capturing the essence of their swapped selves, and it's full of humorous and touching scenes.
One common theme is the exploration of differences. Underfell sans and underswap papyrus are from different universes with distinct personalities. Fanfictions often focus on how they deal with these differences, like underfell sans's more aggressive nature compared to underswap papyrus's more positive and energetic self.
Another option is to join Underswap - related fan communities on platforms like Reddit or Discord. Members often share their favorite fanfictions, and you can ask specifically for non - lemon stories about Sans x Papyrus. They might be able to point you to some hidden gems that you wouldn't find through a general search on the big fanfiction platforms.
A great Underswap Sans x Papyrus fanfiction might be the one that delves into their backstory. It could explore how their relationship developed from when they were younger. Maybe there was a time when they had a big fight but then learned to understand each other better. This kind of story can be really heartwarming as it shows their growth and the strength of their brotherly love.
A third common theme is self - discovery. Both Papyrus and Sans might learn new things about themselves as they interact with each other and face various situations. This can be really interesting as it shows their growth as characters. For instance, Papyrus might discover a new side of his personality when he has to protect Sans in a dangerous situation.
The plot matters a great deal. It could be about their adventures in the Underswap world, or it could be a more emotional story about how they deal with the changes in their relationship due to the swap. A good plot keeps the reader engaged, whether it's full of action, humor, or heart - felt moments. For instance, a plot where they have to work together to save their swapped world from a threat would be exciting.