black_hair bow_(instrument) brown_hair cloud day double_bass euphonium hibike!_euphonium highres instrument katou_hazuki kawashima_sapphire kousaka_reina long_hair multiple_girls neckerchief official_art oumae_kumiko red_neckwear rooftop school_uniform serafuku short_hair sky thighhighs trumpet tuba wavy_hair zettai_ryouiki