idolmaster, idolmaster cinderella girls
aoki sei, trainer (idolmaster)
nekomata naomi
1girl, barefoot, bikini, blush, breast hold, breasts, cleavage, embarrassed, kneeling, large breasts, long hair, monochrome, navel, side-tie bikini bottom, solo, strap slip, swimsuit, untied, wardrobe malfunction
commentary request, highres, photoshop (medium)