1girl alternate_costume arms_behind_back blonde_hair blue_sailor_collar blue_skirt braid braided_bangs braided_bun breast_curtain hair_bun highres kantai_collection long_hair midriff navel neckerchief perth_(kancolle) purple_eyes red_neckerchief sailor_collar school_uniform serafuku shirt_overhang simple_background skirt solo umino_ht upper_body white_background