touhou, pixiv, patchouli knowledge, pokachu, fanart, fanart from pixiv, 1girl, all fours, arm support, ass, back, bangs, bare back, bent knees, black legwear, black socks, blue hair bow, blue hair ornament, blunt bangs, blurry, book, bookshelf, book stack, bow, bun cover, crescent, depth of field, double bun, expressionless, feet, female, from behind, hair bow, hair ornament, heart panties, heart print, kneeling, loli, long hair, looking at viewer, looking back, moon symbol, no shoes, on floor, pantsu, pink panties, pink shimapan, posterior cleavage, print panties, purple eyes, purple hair, purple legwear, shadow, shimapan, solo, stack of books, striped, striped print, striped underwear, topless, topless (female), underwear, underwear only, useless tags, very long hair, viewed from above, wooden floor