I don't know the specific story Ster tells Jerma. There could be various kinds of stories, like an adventure story, a funny anecdote, or a spooky tale.
In the 'jerma sad story', perhaps there was a difficult childhood. Jerma might have faced bullying or poverty. Or maybe he had some sort of accident that changed his life for the worse. There could also be a situation where he was misunderstood by others, which led to a lot of sadness.
You can try looking on popular fanfiction websites like Archive of Our Own. There are often many different types of fan - created stories there, so there's a good chance you'll find some Jerma and Star fanfiction.
One interesting Jerma and Star fanfiction could be a story where they team up on an intergalactic adventure. They might use Jerma's unique skills and Star's otherworldly powers to overcome various challenges in space.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fan - created works, and there's a good chance you'll find some 'star jerma fanfic' there.
As we don't have any information about the story Ster tells Jerma, there's no way to summarize it. Maybe if we knew more about Ster and Jerma's relationship or the situation in which the story was told, we could make an educated guess, but for now, we can't.
The 'jerma sad story' is quite ambiguous. It might be related to Jerma's family. Perhaps there was an illness in the family that caused a lot of distress. Or it could be about Jerma's dreams that were shattered, like not being able to achieve a long - held career goal. Without further context, it's difficult to be certain.