shiitake taishi, himesaki rinami, gakuen idolmaster, idolmaster, commentary request, highres, 1girl, :d, alternate costume, bare shoulders, bikini, black bikini, blue eyes, blush, breasts, brown hair, hair between eyes, hair bun, large breasts, long hair, looking at viewer, navel, night, night sky, open mouth, outdoors, partially submerged, single hair bun, sky, smile, solo, stomach, swimsuit, tongue, water, wet