One common theme is the power dynamic. Since Geto has strong powers in the Jujutsu Kaisen universe, exploring how that affects his relationship with the reader can be interesting. For example, he might protect the reader using his powers.
One common theme is friendship. Their bond, whether it's growing stronger or falling apart, is often explored. For example, many fanfictions show how they supported each other in their early days as sorcerers.
One great fanfiction is 'The Bond Beyond'. It delves deep into the complex relationship between Gojo Satoru and Geto Suguru. It shows their early days at Jujutsu Tech, their training together, and how their ideologies start to diverge. The author does an excellent job of portraying their individual personalities and the strong connection they once had.
According to the information you provided, the lines you quoted seem to be spoken in a certain novel or web novel. In novels, characters often experience some self-doubt and struggle to realize that they are not real humans but some other existence.
However, the specific meaning and background of this sentence needed to be determined according to the context. It could be a mental state, a metaphor, or a part of a particular plot. Therefore, more specific information was needed to determine its meaning and background.
Well, some libraries might have digital collections of manga that include JJK. You could also check out official manga apps or platforms that have the licensing rights.