Summary
A chain of two-person scenes. One character stays, the other exits, a new character enters. Round-robin until it circles back.
Example
Scene one: barista and customer. Scene two: that customer at home with their partner. Scene three: the partner at work. Keep going around.
More Detail
Daisy-chain long-form structure. A+B, then B+C, then C+D — the exiting character becomes the anchor of the next scene. Completes when the chain loops back to a character from the top.