rule 34 2boys animated skeleton blue blush blue penis ectopenis english text gay grey background hooded jacket hoodie humanoid humanoid robot jacket looking away male malemale male only mettaton mettaton ex monochrome monster penis robot robot humanoid sans sans undertale shirt lift shirt pulled up shirt up simple background skeleton small penis solid color background sweat text text bubble undead undertale undertale series unknown artist yaoi 8363600
Rule34
imageboard
2boys
animated skeleton
blue blush
blue penis
ectopenis
english text
gay
grey background
hooded jacket
hoodie
humanoid
humanoid robot
jacket
looking away
male
male/male
male only
mettaton
mettaton ex
monochrome
monster
penis
robot
robot humanoid
sans
sans (undertale)
shirt lift
shirt pulled up
shirt up
simple background
skeleton
small penis
solid color background
sweat
text
text bubble
undead
undertale
undertale (series)
unknown artist
yaoi