nakabayashi_zun, byleth_(female)_(fire_emblem), byleth_(fire_emblem), year_2024, 1girl, alternate_costume, ass, back, backless_dress, backless_outfit, black_dress, blue_hair, breasts, butt_crack, closed_mouth, dress, formal, from_behind, hair_between_eyes, indoors, large_breasts, long_hair, looking_at_viewer, looking_back, purple_eyes, signature, smile, solo, commentary_request, highres, fire_emblem, fire_emblem:_three_houses