A Cannes regular since her teenage years, French star Anaïs Demoustier returns to the Croisette this year to open the festival with The Electric Kiss , Pierre Salvadori’s frothy period romance set in 1920s Paris. Demoustier plays Suzanne, a down-on-her-luck carnival performer billed as “La Vénus Electrificata,” who earns money by letting men kiss her for a literal jolt of “electric love.” Her fortunes shift when she is mistaken for a clairvoyant by a grieving painter, played by Pio Marmaï, desperate to reconnect with his dead wife. What begins as a small con deepens when the painter’s shrewd agent (Gilles Lellouche) spots an opportunity, encouraging Suzanne to continue the deception as a way to revive his client’s creativity — and bankroll them both. As Suzanne studies the dead woman’s diaries to sustain the illusion, her performance becomes increasingly intimate, and increasingly dangerous, as genuine feelings begin to blur the line between artifice and truth.…