1girl arms_behind_back bass_clef beamed_eighth_notes beamed_sixteenth_notes brown_eyes brown_hair brown_serafuku brown_skirt commentary_request cowboy_shot cropped_legs dotted_half_note dotted_quarter_note eighth_rest flat_sign green_background half_note head_tilt hibike!_euphonium highres hokuto_(l_una_r) kitauji_high_school_uniform long_sleeves looking_at_viewer medium_hair musical_note neckerchief oumae_kumiko pleated_skirt quarter_note quarter_rest red_neckerchief sailor_collar school_uniform serafuku sharp_sign skirt smile solo staff_(music) standing treble_clef white_sailor_collar whole_note