chikuwa (tks), izayoi sakuya, touhou, bad id, bad pixiv id, 1girl, :o, alternate costume, aqua hair, ass, bare back, bikini, black eyes, blue hair, blush, body blush, braid, breasts, butt crack, covered erect nipples, female focus, from behind, huge breasts, knife, looking at viewer, looking back, maid headdress, muscular, muscular female, open mouth, short hair, short hair with long locks, sideboob, simple background, solo, string bikini, swimsuit, thigh strap, throwing knife, twintails, weapon, white background