The five most popular story-related questions about Side Quest Season 1, excluding the overall plot and ending, are:

1. What are the main characters' personal struggles and developments in each episode?
2. How does the series explore the lives of different types of Mythic Quest fans and employees?
3. What conflicts arise among the superfans in the comic book shop episode?
4. How does the episode featuring the touring video game orchestra depict the challenges of pursuing a dream job?
5. What impact does the game glitch have on the high school friends and their guild in the final episode?

These questions focus on the character arcs, thematic elements, and specific storylines within the four standalone episodes of the anthology series, which delve into the lives of employees, players, and fans connected to the Mythic Quest universe.