What was Leo's profession? What other work had he done?

What does the term "subterranean" mean in this story? Why was the a term a fitting one to describe the characters in this story?

What doubts did Leo have about his relationship with Mardou? Why?

Describe Leo's relationship with his mother? How did his mother influence his relationship with Mardou?

What attracted Leo to Mardou? What attracted Mardou to Leo?

Why were Leo and Mardou not good for each other? What impact did they have on one another?

What did Yuri represent to both Leo and Mardou? Why was he a trigger in a change in their relationship?