Foursome follows the intertwined lives of four main characters—two couples—who share a luxurious Manhattan penthouse. The series hinges on the exploration of sexual experimentation, relational boundaries, and power dynamics within a closed, intimate setting. Each episode typically presents a central “fantasy” or scenario (e.g., role‑play, BDSM, voyeurism) that serves both as a plot catalyst and an opportunity for explicit scenes.
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