karukan (karukann), shikibe mayu, riddle joker, commentary request, highres, 1girl, adjusting eyewear, aqua eyes, aqua hair, arm at side, bikini, black bikini, blush, breasts, cleavage, closed mouth, coat, collarbone, cowboy shot, cowlick, crossed bangs, eyelashes, glasses, gluteal fold, groin, hair between eyes, hand in pocket, hand up, indoors, lab coat, large breasts, long hair, long sleeves, looking at viewer, navel, official alternate costume, open clothes, open coat, poolside, shiny skin, smile, solo, split mouth, stomach, swimsuit