6+girls :d ahoge akaboshi_koume arms_behind_back belt birthday black black_belt black_jacket black_neckwear black_skirt blue_eyes closed_mouth coffee comic computer cup curly_hair dated day decorations dress_shirt epaulettes erica_hartmann gertrud_barkhorn gift girls_und_panzer girls_und_panzer_saishuushou grey_shirt grey_skirt haiiro_purin hair_ribbon hand_in_hair hand_on_another's_shoulder hand_on_hip hanna-justina_marseille highres holding holding_cup holding_gift indoors itsumi_erika jacket kuromorimine_school_uniform laptop light_smile long_sleeves military military_uniform miniskirt multiple_girls necktie night nishizumi_maho open_mouth party_popper pleated_skirt pouring ribbon school_uniform shirt silver_hair skirt smile strike_witches teapot translated twintails twitter_username uniform white_shirt window wing_collar world_witches_series