1girl, ass, bad_twitter_id, crystal, feet, flandre_scarlet, from_behind, greyscale, hat, himajin_noizu, looking_at_viewer, looking_back, medium_hair, mob_cap, monochrome, panties, panty_peek, puffy_short_sleeves, puffy_sleeves, shirt, short_sleeves, simple_background, skirt, skirt_set, socks, soles, solo, touhou, underwear, white_background, wings