takayaki, futami mami, idolmaster, idolmaster (classic), idolmaster 1, untied, 00s, 1girl, arms behind back, bikini, bikini pull, bikini top only, blonde hair, bottomless, breasts, clothes pull, collarbone, female focus, flat chest, hair bobbles, hair ornament, head tilt, loli, looking at viewer, nipples, one-piece tan, short hair, side ponytail, simple background, smile, solo, swimsuit, tan, tanline, white background