1girl, barefoot, black_bra, black_panties, bra, breasts, brown_eyes, brown_hair, butt_crack, closed_mouth, from_behind, hand_on_own_chin, hiroki_(yyqw7151), idolmaster, idolmaster_shiny_colors, large_breasts, long_hair, looking_away, no_shirt, panties, panties_under_shorts, red_shorts, shorts, sideboob, simple_background, sitting, solo, tsukioka_kogane, underwear, white_background