1girl, animal_ears, arms_behind_head, arms_up, bad_twitter_id, blue_eyes, blue_hair, breasts, closed_mouth, ear_covers, feet_out_of_frame, gaze_on_me!_outfit_(umamusume), horse_ears, horse_girl, horse_tail, k.s.miracle_(umamusume), looking_at_viewer, male_swimwear, midriff, navel, nayuta_ggg, shirt, short_hair, short_sleeves, small_breasts, smile, solo, standing, swim_trunks, tail, tied_shirt, umamusume, white_shirt