koakuma, patchouli knowledge, embodiment of scarlet devil, touhou, artist request, 2girls, bare shoulders, blush, breasts, clothed female nude female, demon girl, demon wings, female focus, from behind, grabbing another's breast, groping, head wings, hime cut, long hair, looking at another, looking back, medium breasts, multiple girls, naughty face, nude, oekaki, one-piece swimsuit, purple eyes, purple hair, red eyes, red hair, school swimsuit, shy, smile, swimsuit, very long hair, wings, yuri