1girl, ass, black_hair, blue_one-piece_swimsuit, from_behind, headphones, i-14_(kancolle), kantai_collection, kote_(dew), looking_back, no_shoes, one-piece_swimsuit, open_mouth, school_swimsuit, school_uniform, serafuku, short_hair, simple_background, smile, soles, solo, swimsuit, white_serafuku, wide_hips