1girl, anima_miko, animal_ears, bad_pixiv_id, blush, bow, box, breasts, brown_eyes, closed_mouth, collarbone, cowboy_shot, desk, ear_covers, heart-shaped_box, horse_ears, horse_girl, horse_tail, looking_at_viewer, medium_breasts, nice_nature_(umamusume), on_desk, purple_serafuku, purple_thighhighs, red_hair, school_uniform, serafuku, sitting, sitting_on_desk, solo, tail, thighhighs, tracen_school_uniform, twintails, umamusume, valentine, white_bow, windowsill, zettai_ryouiki