koshigaya tatsumi, honolulu (kancolle), honolulu (swimsuit) (kancolle), kantai collection, !, !!, 1girl, bikini, black trim, blonde hair, blue eyes, breasts, character name, drill hair, flower, gluteal fold, hibiscus, large breasts, long hair, one-hour drawing challenge, open clothes, red flower, side-tie bikini bottom, simple background, spoken exclamation mark, string bikini, swimsuit, tentacles, thigh gap, twin drills, untied bikini, white background, white bikini