Rule34.GG

Copyright sonic (series)
sonic the hedgehog (series)
Regular 4boys
anthro on anthro
anthro penetrated
anthropomorphic
anthropomorphic animal
balls
ballsack
black sclera
blood in mouth
blood on face
blood stain
bloody nose
bulged belly
classic knuckles
cloacal penetration
cloacal penis
dark blue fur
dilated pupils
echidna
echidna penis
fourth wall
gay sex
grabbing chin
grey background
hand on chest
hate sex
hedgehog
hedgehog boy
knotted penis
knuckles the echidna
kolossos
kolossos fan
lifting leg
looking down
male only
mentioned character
mouthless
mutated
no humans
no nipples
plap
red eyes
red fur
silver the hedgehog
size difference
sonic.exe (series)
sonic.exe the disaster
spread legs
sweat
tremble lines
trembling lines
yaoi