1boy 2girls bags_under_eyes behind_another black_hair blood breasts commentary_request empty_eyes flat_chest holding holding_knife hood hoodie injury knife kuroki_tomoko looking_at_another looking_to_the_side miniskirt multiple_girls murder nemoto_hina open_mouth pink_hair pleated_skirt purple_hoodie school_uniform sidelocks skirt sleeves_past_wrists small_breasts stab sweatdrop two_side_up walkalone watashi_ga_motenai_no_wa_dou_kangaetemo_omaera_ga_warui! wide-eyed window