One way to make a story last longer is to develop the characters more deeply. Give them complex backstories and evolving motivations. Also, introduce subplots that interconnect with the main storyline to add depth and breadth.
You need to have well-developed characters and a plot that keeps evolving. Also, add some unexpected twists and turns to keep the readers on the edge of their seats.
Well, to keep stories longer, you need to flesh out your characters' backgrounds and motivations. Also, introduce unexpected twists and turns in the plot to keep the readers on their toes. Another thing is to build up the world of the story in detail, giving it more depth and breadth.