1girl, ahoge, april_fools, armpits, black_hair, blush, breasts, chest_jewel, cleavage, cleavage_cutout, clothing_cutout, detached_sleeves, hair_between_eyes, hair_ornament, horse_girl, kitasan_black_(umamusume), kouzuki_hajime, looking_at_viewer, medium_breasts, medium_hair, portrait, red_eyes, short_hair, solo_focus, umamusume, white_background