1013860
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original
2010s
2019
2boys
2d
2d_(artwork)
2d_animation
alternate_version_available
anal
animated_skeleton
animation
artist_name
artist_signature
big_dom
big_dom_small_sub
bigger_dom
bigger_dom_smaller_sub
bigger_male
bigger_penetrating
bigger_penetrating_smaller
blue_blush
blush
bottom_sans
bottomless
brother
brother/brother
brother_and_brother
brother_penetrating_brother
brothers
digital_media_(artwork)
duo
ectopenis
fontcest
ganzooky
gif
gloves
incest
intraspecies
larger_male
larger_penetrating
larger_penetrating_smaller
looking_at_another
looking_at_partner
male
male/male
male_only
male_penetrating
monster
monster_boy
nsfwsinningsans
orange_blush
orange_penis
papyrus
papyrus_(undertale)
papysans
partially_clothed
partially_clothed_male
penetration
penis
red_gloves
sans
sans_(undertale)
seme_papyrus
sex
sibling_incest
siblings
simple_background
skeleton
small_sub
small_sub_big_dom
smaller_penetrated
smaller_sub
smaller_sub_bigger_dom
thrusting
top_papyrus
twitter
uke_sans
undead
undertale
undertale_(series)
video_game_character
video_games
yaoi
tags