idolmaster, idolmaster (classic), ganaha hibiki, tsurui, high resolution, simple background, white background, 1girl, armpits, arms up, bare arms, bikini, black hair, blush, breasts, earrings, female, green eyes, hair ornament, hair ribbon, half-closed eyes, hoop earrings, in profile, jewelry, long hair, looking at viewer, medium breasts, navel, ponytail, ribbon, sailor bikini, sailor collar, sailor swimsuit (idolmaster), solo, stomach, swimsuit, tied hair, white bikini, white ribbon, white swimsuit