koaya, shiun sumika, gakuen idolmaster, idolmaster, highres, 1girl, armpits, arms behind head, arms up, bikini, bikini under shorts, blue bikini, blue shorts, breasts, cowboy shot, cutoff jeans, cutoffs, denim, denim shorts, eyewear on head, green eyes, kimi to semi blue (idolmaster), long hair, looking at viewer, medium breasts, mole, mole under eye, navel, official alternate costume, orange hair, shorts, signature, smile, solo, stomach, sunglasses, swimsuit, thigh strap, water, white-framed eyewear