1girl amami_haruka bangs blue_eyes blush breasts eyebrows_visible_through_hair hair_ribbon heart heart-shaped_boob_challenge heart-shaped_pupils heart_hands hidebou idolmaster idolmaster_(classic) large_breasts looking_at_viewer medium_breasts nipples nude open_mouth pinky_out red_ribbon ribbon simple_background suggestive_fluid sweat symbol-shaped_pupils tongue tongue_out upper_body white_background