1girl, b1ack_illust, blue_eyes, blush, bottle, braid, brown_hair, buruma, gym_shirt, gym_uniform, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, kousaka_umi, long_hair, looking_at_viewer, open_mouth, red_buruma, shirt, short_sleeves, solo, thighs, twin_braids, water_bottle, white_background, white_shirt