Rajiv Joseph’s 2009 drama “Gruesome Playground Injuries” is both a love story and a slow-motion collision—brought into sharp, lingering focus in a new Off-Broadway revival at the Lucille Lortel Theatre.

The immediate intrigue surrounding this production is its casting. Nicholas Braun, in his first major New York stage appearance since the end of “Succession,” brings the same gawky, searching vulnerability that made Cousin Greg an unlikely cultural icon.

Opposite him is two-time Tony Award winner Kara Young, now one of the city’s most formidable stage performers, whose recent streak of acclaimed Broadway performances includes “Purlie Victorious,” “Purpose,” “Clyde’s,” and “Cost of Living.” Together, they form a pairing that heightens the emotional voltage of Joseph’s intimate two-hander.

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