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4girls amplifier band bass_guitar black_hair black_legwear blonde_hair blue_hair bulletin_board cable cardigan chalkboard classroom clock cymbals drum drum_set drumsticks electric_fan electric_guitar electric_socket fluorescent_lamp from_behind from_side guitar guitar_case headphones indoors instrument instrument_case keyboard_(instrument) long_sleeves looking_away looking_down microphone microphone_stand multiple_girls music necktie original pantyhose pedal_board photo_(object) piano piano_bench pink_cardigan pleated_skirt ponytail red_hair reflection reflective_floor rug school_uniform shirt shoes short_hair short_sleeves sitting skirt sneakers socks standing stool striped striped_neckwear vest white_legwear white_shirt window wooden_floor zxlai