Initially I was about to a put 4 for this, but then I got to the part where Luke met with Sebastian again just pages before the story end, then came the closing scene of Luke and Russell, and I went... "That's it!???"
I think the end was too rush and wish it could be longer. But that's always the case with short story that you enjoy, it's never enough. Because despite my tantrum when I finish this story, I like it. :)