1girl, armband, ass, black_hair, black_sailor_collar, black_serafuku, black_skirt, blue_archive, blush, closed_eyes, embarrassed, facing_to_the_side, flying_sweatdrops, from_behind, halo, high-waist_skirt, mashiro_(blue_archive), no_pants, open_mouth, panties, red_armband, sailor_collar, school_uniform, serafuku, short_hair, simple_background, skirt, solo, spoken_blush, tscplayer, underwear, white_background, white_panties