hideki nagamachi, the idolmaster cinderella girls, the idolmaster series, seiza, sitting, japanese clothes, kimono, multiple girls, long hair, sash, obi, black hair, 6+girls, indoors, stage, hands on lap, bangs, long sleeves, twintails, blue hair, brown hair, hair ornament, smile, flower, umbrella, closed eyes, blunt bangs, plant, wide sleeves