1girl animal_ears artist_logo belt black_coat black_footwear black_hair blue_eyes boots briefcase coat collared_shirt dream_journey_(umamusume) eyewear_strap floating_hair grey_hair head_tilt holding holding_briefcase horse_ears horse_girl horse_tail juliet_sleeves long_hair long_sleeves looking_at_viewer multicolored_hair nishioki_tama puffy_sleeves red_shirt shirt signature simple_background solo streaked_hair tail umamusume very_long_hair white_background