1girl, bad_pixiv_id, bare_shoulders, blue_eyes, breasts, britomart_(fate), britomart_(final_ascension)_(fate), casual_one-piece_swimsuit, center_opening, cleavage, double_bun, fate/grand_order, fate_(series), gold_trim, grey_hair, grey_thighhighs, hair_bun, heatia, highleg, highleg_swimsuit, large_breasts, legs_up, long_hair, lying, on_back, one-piece_swimsuit, pointy_ears, solo, swimsuit, taut_clothes, taut_swimsuit, thighhighs, thighs, twintails, two-tone_swimsuit, very_long_hair, white_one-piece_swimsuit, yellow_one-piece_swimsuit