2girls, ^^^, aqua_background, blank_eyes, blue_hair, brown_cardigan, brown_necktie, brown_skirt, cardigan, chibi, collared_shirt, contllenge, crazy_eyes, crazy_smile, feet_out_of_frame, gloom_(expression), hair_ribbon, holding, holding_syringe, injection, kotonoha_akane, kotonoha_aoi, long_hair, long_sleeves, looking_at_another, loose_necktie, motion_lines, multiple_girls, necktie, on_bench, one_side_up, pink_hair, pleated_skirt, ribbon, shaded_face, shirt, siblings, sidelocks, sisters, sitting, skirt, sleeve_rolled_up, smile, sweat, syringe, tea, trembling, turn_pale, v-shaped_eyebrows, voiceroid, white_shirt, wide-eyed