1girl, o, ahoge, ass, blazer, blush, breasts, brown_hair, butt_crack, curvy, echihiro, full-face_blush, idolmaster, idolmaster_million_live!, jacket, large_breasts, looking_at_viewer, looking_back, panties, pantyshot, pleated_skirt, red_skirt, simple_background, skirt, solo, straight_hair, tokoro_megumi, underwear, uniform_series_(idolmaster), upskirt, white_background