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Joanie Loves Chachi, a spin-off of the popular sitcom "Happy Days," focused on the characters of Joanie Cunningham (played by Erin Moran) and Chachi Arcola (played by Scott Baio). The series followed the couple as they navigated their relationship, family, and personal growth in the 1950s and 60s. It aimed to capture the essence of the original show while exploring new storylines and character dynamics.