1girl, arms_behind_back, blush, breasts, brown_hair, collarbone, crop_top, green_eyes, himekawa_yuki, idolmaster, idolmaster_cinderella_girls, kotaro, large_breasts, long_hair, looking_at_viewer, midriff_peek, red_skirt, shirt, simple_background, skirt, sleeveless, sleeveless_shirt, solo, straight_hair, very_long_hair, white_background