1girl, ahoge, alternate_costume, animal_ears, bed_sheet, brown_hair, chestnut_mouth, closed_eyes, gradient_background, hair_between_eyes, horse_ears, horse_girl, koupen-chan, koupen-chan_(character), kusanagi_kaoru, looking_at_viewer, multicolored_hair, multiple_views, purple_eyes, sleeping, smile, streaked_hair, symboli_rudolf_(umamusume), umamusume, yawning