1girl black_shirt bow butt_crack commentary_request crop_top from_behind green_hair green_skirt grey_sailor_collar grin hair_bow kantai_collection long_hair looking_at_viewer looking_back matetsu_(nakayoshi_sanfujinka) pleated_skirt ponytail sailor_collar school_uniform serafuku shirt simple_background skirt smile solo white_background wristband yuubari_(kancolle)