Buffy the Vampire Slayer (1997)

S4E18 Where the Wild Things Are

As Buffy and Riley share an intense night of intimacy, their fervor unexpectedly awakens mystical forces lurking within a nearby fraternity house. The ensuing chaos draws them deeper into a world of supernatural mayhem, where they must confront not only the unleashed creatures but also the implications of their own relationship. With danger looming, the couple must navigate the wild events set in motion by their passionate connection.