maru (marg0613), i-203 (kancolle), kantai collection, absurdres, highres, 1girl, blue eyes, blue hair, blue skirt, blue sports bra, dated, fake horns, headgear, horned headwear, horns, leaning back, long hair, midriff, nontraditional school swimsuit, one-hour drawing challenge, pencil skirt, school swimsuit, simple background, skirt, solo, sports bra, stomach, swimsuit, twitter username, white background