1girl alternate_costume bag baseball_cap black_hair blue_sailor_collar blue_sky bottle cloud commentary_request commission grey_eyes grey_headwear hat hayasui_(kancolle) highres kantai_collection midriff_peek navel neckerchief panties red_neckerchief sailor_collar school_bag school_uniform serafuku shirt short_hair short_sleeves sky solo taira_yuuki underwear white_panties white_shirt