There's a fanfic called 'Gabimaru and Sagiri: The Unlikely Alliance'. In this one, they start off as reluctant partners but gradually form a deep connection. The author does an amazing job of showing Gabimaru's protective side towards Sagiri and how Sagiri comes to respect Gabimaru's skills and determination. It has some really intense and emotional scenes that make it a great read.
Fate/stay night has four comics:
Fate/Stay Night (2007)
Fate/Stay Night: Heaven's Feel (2009)
Fate/Stay Night: Heaven's Feel II (2010)
Fate/Zero (2011)
In addition, there was a rumored work called Fate/Hollow Ataraxia(2013), which was a derivative work of Fate/Stay Night.
Characterization is key. A good Gabimaru x Sagiri fanfic should accurately portray their personalities. Gabimaru is tough yet has a soft side, and Sagiri is strong - willed and determined. If the fanfic can show how they complement each other, it's great. For example, Gabimaru's combat skills and Sagiri's strategic mind working together.
A common theme is the exploration of their relationship growth. Since they come from different backgrounds, fanfics often show how they overcome differences.
One place to find gabimaru x sagiri fanfiction could be Archive of Our Own (AO3). There are often many well - written fanfics there. You can search for the specific pairing and then sort by popularity or rating to find some great reads.
The anime " My Big Brother's Brain Is Crap " did not specify which chapter was the first chapter, so it was impossible to determine the specific episode where the picture was located. However, according to the content displayed in the picture, it seemed to be describing a certain plot or scene. Therefore, he could continue to search for relevant information or ask other viewers based on this clue.