1girl, ahoge, blush, breasts, fate/grand_order, fate_(series), fujimaru_ritsuka_(female), hand_up, large_breasts, looking_at_viewer, lying, on_back, one-piece_swimsuit, orange_eyes, orange_hair, ruri_rarako, sand, see-through, short_hair, solo, swimsuit, wet, wet_clothes, wet_swimsuit, white_one-piece_swimsuit