1girl, blush, breasts, cleavage, collarbone, fundoshi, girls_und_panzer, hiyama_yuu_(wee259hiyama), japanese_clothes, large_breasts, looking_at_viewer, monochrome, navel, no_bra, open_mouth, pointing, pointing_at_viewer, purple_background, short_hair, simple_background, solo, sono_midoriko, whistle, yamakasa