1girl, o, arm_between_legs, barefoot, bed_sheet, black_bra, black_panties, blush, bra, breasts, brown_hair, cleavage, collarbone, idolmaster, idolmaster_shiny_colors, large_breasts, long_hair, looking_at_viewer, navel, panties, sitting, solo, tsukioka_kogane, underwear, underwear_only, ushimo_(dztu8434), very_long_hair, wariza