seiji_(artman) best from last day

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seiji (artman)

1girl alternate_costume animal_ears bed breasts cleavage collarbone cuffs enmaided hair_between_eyes hair_ornament handcuffs heart highres horse_girl key looking_at_viewer maid maid_headdress medium_breasts satono_diamond_(umamusume) seiji_(artman) seiza sitting sweat t-head_trainer_(umamusume) thighhighs trainer_(umamusume) umamusume
1girl alternate_costume animal_ears bed breasts cleavage collarbone cuffs enmaided hair_between_eyes hair_ornament handcuffs heart highres horse_girl key looking_at_viewer maid maid_headdress medium_breasts satono_diamond_(umamusume) seiji_(artman) seiza sitting sweat t-head_trainer_(umamusume) thighhighs trainer_(umamusume) umamusume