sanche_(3che3), kuroe_mayu, year_2024, 1girl, :d, black_serafuku, blue_eyes, border, brown_hair, from_side, gradient_background, long_hair, looking_at_viewer, looking_to_the_side, neckerchief, pink_background, school_uniform, serafuku, simple_background, smile, solo, upper_body, white_border, white_neckerchief, absurdres, highres, hibike!_euphonium