This one wears you down in the best way, because Lunlun never gets to stay anywhere. Fifty episodes of a girl who keeps packing up again, one European town at a time, with a cat named Cateau and a dog named Nouveau doing the talking and the worrying. The Flower Brooch is the tell for how this show thinks: it doesn't hand her power, it hands her a nurse's uniform, a dancer's costume, whatever role gets her close enough to a stranger's life to actually help. Togenishia and Yabouki chasing the same Seven Color Flower keeps the plot honest, but the real pull is Serge turning up out of nowhere, saying almost nothing, and leaving before she can ask. Toei in 1979 understood that a quest works best when the destination is barely the point. You remember the goodbyes, not the flower.
The King of the Flower Planet is dying, and his heir cannot take the throne until the legendary Seven Color Flower, the emblem of royal power, is recovered. Two Angels, Cateau and Noveau, travel to Earth in search of the Flower Girl, a young woman descended from both humans and the Flower Angels who once lived on Earth. They find her in Lunlun, a girl in France, and persuade her to set out on a long journey to find the flower. Along the way she sees both the good and the bad in humans and in Flower Angels, the latter embodied by the ambitious Togenishia and her sidekick Boris. She also falls in love with Serge Flora, a man who keeps a great secret. The series is a magical girl adventure with dramatic elements.