hideki nagamachi, the idolmaster cinderella girls, the idolmaster series, multiple girls, japanese clothes, kimono, hair ornament, black hair, open mouth, short hair, smile, hair flower, flower, one eye closed, fireworks, closed eyes, holding hands, festival, brown hair, brown eyes, blonde hair, floral print, blush, yukata, 5girls, 6+girls, grey hair, blue hair, sash, red kimono, purple kimono, hair bun