the thematic focus between the Main Character and the Impact Character
Elsewhere you will read that this Story Point represents the philosophical argument between Main and Influence Character. Wrong. The Relationship Story Issue of a story is less concerned with an argument between the Main Character and Influence Character and more concerned with the issue that exists in the relationship between these two. If their Issue is Commitment, it doesn't mean they will be arguing about Commitment; it means their relationship will have Commitment issues.
Relationship Story Issue
Focus on the space between the two principal characters, not the characters themselves.
The nature of the activities which make up the relationship between the Main and Impact Characters which is the Relationship Story Throughline is described by this item. The Relationship Story Throughline Issue describes the way the relationship between the Main and Impact Characters will work thematically in the Grand Argument of the story, so at the same time it generally describes the kinds of things that will pop up to illustrate this theme.