yamashita yuu, misaka mikoto, shirai kuroko, toaru kagaku no railgun, toaru majutsu no index, absurdres, detexted, highres, non-web source, third-party edit, 00s, 2009, 2girls, :3, all fours, ass, back, barefoot, black one-piece swimsuit, blush, bow, brown eyes, brown hair, competition swimsuit, covering breasts, covering privates, embarrassed, feet, flat chest, frown, full body, hair bow, hair ornament, hairclip, kneepits, legs, long hair, looking back, matching hair/eyes, multiple girls, one-piece swimsuit, pink eyes, pink hair, school swimsuit, short hair, sitting, smile, swimsuit, tokiwadai school swimsuit, twintails, water, wet