Rule 34 Dev - 1girl animal_ears arms_behind_head arms_up black_shirt blue_eyes braid braided_bangs highres horse_ears horse_girl luca_(luca_0520) medium_hair open_mouth saliva shirt short_sleeves sidelocks simple_background single_braid solo stretching t-shirt twintails umamusume venus_paques_(umamusume) yawning|23029908759