goounagi, kohinata_miku, tachibana_hibiki_(symphogear), year_2024, 2girls, black_hair, blush, breasts, closed_eyes, comic, from_behind, grabbing_another's_breast, greyscale, groping, lactation, medium_breasts, moaning, monochrome, multiple_girls, navel, nipples, open_mouth, short_hair, simple_background, yuri, absurdres, highres, senki_zesshou_symphogear