1girl :| bangs black_hair black_serafuku black_skirt black_thighhighs blunt_bangs boots closed_mouth commentary_request from_side gradient_background grey_background hand_on_own_knee horns katana kureta_(nikogori) looking_at_viewer medium_hair neckerchief oni oni_horns original panties pantyshot pleated_skirt red_eyes sailor_collar school_uniform serafuku sheath sheathed sitting skirt solo sword thighhighs thighhighs_under_boots underwear v-shaped_eyebrows weapon white_background white_neckerchief white_panties