1990s_(style), 1girl, armpits, ayasaki_wakana, ball, beach, beachball, black_hair, breasts, brown_eyes, casual_one-piece_swimsuit, cleavage, collarbone, cowboy_shot, day, dutch_angle, from_above, hair_between_eyes, happy, hip_focus, kai_tomohisa, long_hair, looking_at_viewer, looking_up, medium_breasts, one-piece_swimsuit, open_mouth, outdoors, outstretched_arms, painting_(medium), photoshop_(medium), retro_artstyle, sentimental_graffiti, smile, solo, spread_arms, standing, straight_hair, swimsuit, thigh_gap, traditional_media, watercolor_(medium), white_one-piece_swimsuit