1girl, ahoge, barefoot, black_hair, blue_one-piece_swimsuit, blush, covered_navel, embarrassed, flat_chest, hair_between_eyes, ishida_arata, kantai_collection, long_hair, looking_at_viewer, lying, mikazuki_(kancolle), old_school_swimsuit, one-piece_swimsuit, school_swimsuit, solo, swimsuit, twitter_username, white_background