rule 34 4 fingers 4 toes against surface against wall anthro arms above head balls belly black arms black ears black feet black nose blue hair blue markings bound canid canine captured chastity cage chastity device collar concrete floor concrete wall cracked wall cuff restraint dim lighting dungeon ear piercing feet fingers fluffy fluffy tail chastity fox front view fur genitals green eyes grey body grey fur hair hay hi res howlart inside kneeling label looking aside male mammal markings metal collar metal cuffs neutral expression nipples nude number pawpads piercing prisoner questionable consent red pawpads restraints shackles sheath cage signature slave solo spread legs spreading story story at source story in description straw tail takum tan belly toes wall structure white tail tip wrists tied 8996983