1girl adapted_costume bikini black_bikini brown_hair cropped_legs gradient_hair green_sailor_collar highres kantai_collection lowleg lowleg_bikini multicolored_hair mutsuki_(kancolle) mutsuki_kai_ni_(kancolle) neckerchief one-hour_drawing_challenge red_hair red_neckerchief sailor_bikini sailor_collar short_hair side-tie_bikini_bottom sitting solo swimsuit tf_cafe