:o alternate_costume arm_at_side backless_outfit bangs bare_arms bare_legs bare_shoulders barefoot black_swimsuit blue_ribbon blunt_bangs breasts casual_one-piece_swimsuit center_opening cleavage collarbone echj full_body girls_frontline green_eyes hair_ornament hair_ribbon hairclip hand_on_own_chest hk416_(girls_frontline) kneeling long_hair looking_at_viewer medium_breasts navel one-piece_swimsuit one_side_up open_mouth ribbon silver_hair sketch solo stomach swimsuit very_long_hair