aruke (gter7727), arimura mao, gakuen idolmaster, idolmaster, absurdres, highres, 1girl, bikini, blue eyes, blurry, blurry background, blush, breasts, brown hair, cleavage, closed mouth, dripping, fingernails, hand on own hip, holding, holding water gun, hood, hood down, hooded jacket, jacket, navel, open clothes, open jacket, rainbow, short hair, smile, solo, sparkle, stomach, swimsuit, water drop, water gun, wet, white bikini, white jacket