1980s_(style), 1girl, adidas, arms_at_sides, blue_sky, breasts, buttons, closed_mouth, cloud, collarbone, competition_swimsuit, covered_navel, cowboy_shot, day, dress_shirt, drop_earrings, earrings, emblem, green_hair, groin, hair_ribbon, halterneck, hatsuseno_alpha, high_ponytail, highleg, highleg_swimsuit, jewelry, legs_together, long_sleeves, looking_at_viewer, matsuda_(matsukichi), medium_breasts, ocean, off_shoulder, one-piece_swimsuit, open_clothes, open_shirt, outdoors, pink_ribbon, ponytail, purple_eyes, retro_artstyle, ribbon, shirt, short_hair, short_ponytail, signature, sitting, sky, sleeves_past_wrists, smile, solo, swimsuit, swimsuit_under_clothes, thighs, turtleneck, turtleneck_swimsuit, unbuttoned, water, white_shirt, yellow_one-piece_swimsuit, yokohama_kaidashi_kikou