watanabe yoshihiro, hasegawa kobato, boku wa tomodachi ga sukunai, commentary request, highres, revision, 1girl, ass, bare shoulders, bikini, black background, blonde hair, blue eyes, blush, breasts, closed mouth, cosplay, from behind, gradient background, heterochromia, kigurumi, lens flare, long hair, looking at viewer, looking back, median furrow, pink bikini, purple eyes, red eyes, shoulder blades, side-tie bikini bottom, small breasts, smile, solo, string bikini, swimsuit, two side up, untying