3girls, 4koma, black_hair, black_skirt, brown_hair, chair, closed_eyes, comic, day, grey_hair, idolmaster, idolmaster_shiny_colors, indoors, izumi_mei, long_hair, long_sleeves, mayuzumi_fuyuko, misumi_(niku-kyu), multiple_girls, one_eye_closed, plant, pleated_skirt, pulque, sailor_collar, school_uniform, serafuku, serizawa_asahi, sitting, skirt, suggestive_fluid, water_balloon, window