1girl, ass, boots, feet_out_of_frame, greyscale, high-waist_skirt, idolmaster, idolmaster_cinderella_girls, jougasaki_rika, kanya_pyi, legs, long_hair, monochrome, open_mouth, panties, pantyshot, profile, shirt, skirt, sleeves_rolled_up, smile, solo, sweat, two_side_up, underwear