ruki matsui, the idolmaster cinderella girls u149, the idolmaster series, multiple girls, dress, houjou satoko, white dress, blonde hair, 6+girls, from behind, short hair, holding hands, twintails, long hair, stage, hairband, brown hair, black hair, sakurai momoka, green dress, bow, sleeveless dress, facing away, sleeveless, ryuuguu rena, ribbon, orange hair