1024946
download
original
2020s
2021
2boys
2d
2d_(artwork)
2males
abosinsin
anal
animated_skeleton
bad_id
bad_twitter_id
big_penis
bigger_male
bigger_penetrating
bigger_penetrating_smaller
blue_blush
blue_penis
blue_tongue
blush
boots
bottom_on_top
bottom_sans
brother
brother/brother
brother_and_brother
brother_penetrating_brother
brothers
closed_eyes
clothed
clothed_sex
digital_media_(artwork)
duo
ectopenis
ectotongue
edit
edited
erect_while_penetrated
erection
fontcest
gay
genitals
hand_on_another's_shoulder
hooded_jacket
hoodie
inactive_account
incest
intraspecies
jacket
larger_male
larger_penetrating
larger_penetrating_smaller
line_art
lineart
looking_pleasured
lying_down
male
male/male
male_only
male_penetrated
male_penetrating
male_penetrating_male
moaning
monster
monster_boy
open_mouth
orange_blush
orange_penis
overstimulation
papyrus
papyrus_(font)
papyrus_(undertale)
papysans
partially_colored
penetration
penis
penis_size_difference
pleasure_face
sans
sans_(undertale)
seme_papyrus
service_top
sex
sex_through_clothes
sex_through_clothing
sibling_incest
siblings
size_difference
skeleton
small_penis
smaller_male
smaller_penetrated
smooth_penis
sweat
tears
tears_of_pleasure
text
third-party_edit
tongue
tongue_grab
tongue_out
top_papyrus
twitter_username
uke_sans
undead
undertale
undertale_(series)
veiny_penis
video_game_character
video_games
x-ray
yaoi
tags