a1 (initial-g), hinako (issho ni training), issho ni training, 00s, 10s, 1girl, armpits, arms behind head, barefoot, bottomless, breasts, brown hair, camisole, dorsiflexion, exercising, feet, female focus, full body, hairband, large breasts, muscular, no pants, one-piece tan, open mouth, panties, red eyes, short hair, simple background, sit-up, sitting, smile, solo, tan, tanline, underwear, white background, white panties