Rule34.GG

Regular 1boy
armpits
black hair
blue eyes
blush
blush lines
blushing
blushing at viewer
drunk
fate/grand order
fate (series)
femboy
genderswap
genderswap (ftm)
light-skinned male
light skin
long hair
looking at viewer
male
male only
military uniform
nipples
on all fours
open mouth
potti-p
rule 63
smile
smiling at viewer
stomach
teeth
tongue
underwear
ushiwakamaru (fate)
ushiwakamaru (fate/grand order)