oniiyanna umamusume agnes_tachyon_(tach-nology)_(umamusume) agnes_tachyon_(umamusume) 1girl ahoge animal_ears artist_name breasts brown_hair coat collarbone english_text hanging_breasts horse_ears horse_girl horse_tail lab_coat large_breasts naked_coat nipples open_mouth red_eyes simple_background sleeves_past_fingers sleeves_past_wrists smile solo tail white_background white_coat highres