1girl absurdres artist_name black_bra black_panties blurry blush bokeh bra breasts brown_hair closed_mouth commentary cowboy_shot depth_of_field english_commentary grand_piano green_eyes highres idolmaster idolmaster_cinderella_girls instrument long_hair looking_at_viewer matsuyama_kumiko medium_breasts musical_note musical_note_print navel panties piano print_bra print_panties shadow signature smile solo sparkle standing thigh_gap underwear underwear_only vzmk2 yellow_background