isshi pyuma, misaka mikoto, saten ruiko, toaru kagaku no railgun, toaru majutsu no index, scan, 2023, 20s, 2girls, alternate costume, arm behind back, bare shoulders, bikini, black hair, blue bikini, blue eyes, blush, breasts, brown eyes, brown hair, cleft of venus, collarbone, flower, front-tie bikini top, front-tie top, frown, hair behind ear, hair flower, hair ornament, hairpin, hand on own thigh, long hair, looking at viewer, matching hair/eyes, medium breasts, multiple girls, navel, open mouth, pink bikini, ribs, short hair, side-tie bikini bottom, simple background, small breasts, split screen, standing, stomach, string bikini, swimsuit, thighs