1girl, aqua_hair, black_serafuku, blurry, blurry_background, blush, crop_top, cropped_shirt, floating_hair, idolmaster, idolmaster_million_live!, indoors, kitakami_reika, long_hair, long_sleeves, looking_at_viewer, navel, neckerchief, ooho0216, red_neckerchief, school_uniform, serafuku, smile, solo, twintails