Well, I'm not sure about specific ones off - hand. But you could also check out some Undertale fanfiction forums. Sometimes fans share their favorite 'underfell sans x grillby' stories in those communities. They might even have reviews or summaries to help you decide which ones to read.
Searching for 'underfell sans x grillby yaoi fanfiction' can be an interesting adventure. You can start by looking at Tumblr. There are often fanfic writers who post their works there. Additionally, some Discord servers dedicated to the relevant fandom might also be a good place to look. Just be aware that the quality and content can vary greatly, so it might take some time to find something that suits your taste.
One common theme is friendship. Despite their different natures, Sans and Grillby can be shown developing a deep bond. Another theme is the contrast between their personalities. Sans is often more laid - back and Grillby is more reserved, and exploring that contrast can make for interesting stories.
There's a really cool fanfic called 'FellSwap Encounters'. It delves deep into the relationship between underfell sans and underswap sans. It starts with a chance meeting and then shows how they gradually understand and support each other. The author does a great job of showing their different characteristics and how they complement one another.
There's also 'Sibling Rivalry Reimagined' which delves deep into how their personalities from their respective universes interact. It has some really interesting character development for both Sanses. It shows how their differences can lead to both conflict and unexpected understanding. The author does a great job of portraying their emotions and the way they communicate, which is quite different from the original game's interactions.
To find 'underlust sans x grillby fanfiction', first, you need to be aware of the characteristics of both characters in the Underlust universe. Sans is often depicted with certain traits, and Grillby has his own charm. Some fanfictions might focus on their relationship development, while others could be more about a specific adventure they go on together. Try using specific search terms related to their relationship, like 'underlust sans and grillby romance' or 'underlust sans grillby friendship' on fanfiction search engines. This way, you can narrow down your search and find some interesting fanfictions.
One reason could be the exploration of new relationships within the established fandom. Fans like to see how these two characters, who have their own identities in the 'underfell' universe, interact in a romantic and often yaoi - themed way. It allows for creativity in storytelling, like how they overcome differences or how their relationship develops in a world full of challenges. Also, the yaoi aspect appeals to those who enjoy male - male relationship stories, adding a new dimension to the existing lore of the 'underfell' world.
I'm sorry, I can't directly recommend specific yaoi fanfiction as it often involves non - official and sometimes inappropriate content. However, you can try searching on fanfiction - dedicated websites like Archive of Our Own (AO3), but make sure to abide by their terms of use.
One popular 'underfell sans x underswap sans fanfic' is 'Twisted Bonds'. It explores their relationship in a really interesting way, with great character development.
There's also 'Unexpected Encounters'. This fanfiction delves deep into how underfell sans and underswap papyrus might interact. It starts with a chance meeting and then unfolds into a story full of twists and turns. Their personalities are really brought to life in this one. It shows how they overcome differences and form a special connection.
One way to find non - lemon 'sans x grillby' fanfics is to go to Tumblr. There are a lot of Undertale fans on Tumblr who share and recommend fanfics. Look for blogs that focus on Undertale fanfic reviews or recommendations. They often categorize the fanfics based on the type of relationship and content, so it should be easier to find ones that are just about the relationship between sans and grillby in a non - inappropriate way.