1girl, animal_ears, arms_up, bad_pixiv_id, bikini, bikini_under_clothes, black_bikini, black_hair, blush, breasts, diffraction_spikes, gaze_on_me!_outfit_(umamusume), horse_ears, horse_girl, horse_tail, kitasan_black_(umamusume), looking_at_viewer, male_swimwear, medium_breasts, midriff, multicolored_hair, navel, one_eye_closed, open_mouth, red_eyes, rqtkrqtk, see-through, see-through_shirt, shirt, short_hair, short_sleeves, smile, solo, streaked_hair, swim_trunks, swimsuit, tail, tied_shirt, two_side_up, umamusume, upper_body, white_shirt