1girl, animal_ears, blue_eyes, blue_hair, blush, breasts, ear_covers, gyouza_(mhea5724), horse_ears, jacket, k.s.miracle_(umamusume), long_sleeves, looking_at_viewer, lying, medium_breasts, medium_hair, on_back, on_bed, open_clothes, open_jacket, open_mouth, partially_unzipped, pillow, shirt, solo, tracen_training_uniform, umamusume, upper_body, white_shirt