2girls, asymmetrical_bangs, blue_buruma, blurry, blurry_background, blush, brown_hair, buruma, futami_ami, futami_mami, gym, gym_uniform, hands_on_own_knees, idolmaster, idolmaster_(classic), idolmaster_million_live!, kneehighs, knees_up, leaning_forward, looking_at_viewer, multiple_girls, outside_border, shoes, short_sleeves, siblings, side_ponytail, sisters, sitting, smile, socks, tsurui, twins, uwabaki, white_socks