 The promotional video for "Labrador Retriever" begins with a woman in a kitchen, as she pours dog food into a metal bowl.The sound echoes through the house, surrounding sleeping teen girl Mayu Watanabe, and inspiring a dream in which she and other members of the group dance on a beach, in 1970s-style bikinis.As they dance, a Labrador Retriever approaches some of those same girls "in town," wearing street clothing.