1girl, b-ko_(shuuen_no_shiori), blazer, blood, blood_stain, blood_writing, brown_eyes, brown_hair, buttons, cardigan, character_name, double-breasted, dress_shirt, emblem, hair_between_eyes, hair_ribbon, holding, holding_paper, index_finger_raised, jacket, long_sleeves, marker_(medium), monochrome_background, necktie, open_mouth, paper, plaid, plaid_skirt, red_necktie, red_ribbon, red_skirt, ribbon, sana_(pixiv9845436), school_emblem, school_uniform, shirt, short_hair, shouting, shuuen_no_shiori_project, skirt, sleeve_cuffs, solo, striped, striped_background, sweater, traditional_media, upper_body, white_shirt, wing_collar