1girl alternate_costume animal_ears arms_up black_hair breasts cloud commentary_request cover_image dress hat highres horse_ears lens_flare looking_at_viewer medium_breasts mejiro_dober_(umamusume) mejiro_dober_(vacation_safir)_(umamusume) nakahira_guy official_alternate_costume purple_eyes seek_solve_summer_walk!_(umamusume) sky sleeveless sleeveless_dress solo straw_hat sun umamusume