2girls, ^_^, ^o^, ass, ass_focus, bare_legs, black_shirt, brown_hair, closed_eyes, idolmaster, idolmaster_shiny_colors, kneeling, lace-trimmed_panties, lace_trim, multiple_girls, osaki_amana, osaki_tenka, panties, pantyshot, pink_panties, shirt, siblings, sisters, twins, underwear, wanimaru