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Undertail

Monster Kid
Looks like Frisk isn't going to get the true pacifist ending.
oh boy by freeanimalz (sans)
hOI! - c1-11131
Asriel called out for help [Source + lineart in comments]
Teach Me, Toriel (by Kotetsu Rexen) (Herm content)
My boyfriend got me a drawing tablet for Christmas. The most logical thing to do
Sexy Papyrus in the nude
Asriel x Frisk
I'm surprised this hasn't been posted yet. My favorite Temmie picture!
You Feel Your Sins Crawling in Your Pants (CharaxSans)
Toriel (by TheWill/thelewdwill on Tumblr)
He'll take your heart, and not just on valentine's day either.
more Sans bonin' himself
Toriel
Asriel Kiss
Frisk and Undyne
Goat Dad
Messy Mettaton Carryfuck
How to Draw Hands - Boss Monster Edition
Teatime with Muffet (oc)
Passion [Asgore x Toriel]
Alphys masturbating (Credit to drako1997 for making these)
Which one of you was this
Papyrus x Undyne (Not A Shitpost version)
Goat Ass [Artist: bzeh]
Toriel, Yoshi, and Lucario - a completely necessary and obvious pairing [By darkmirage
Muffet's new sales product
I always did wonder where Toriel got that cream for her pies.
Blue on Blue
Undyne
Vulcan ಠ_ಠ
Another muffet gangbang
Vulkin making someone erupt
Asriel touching Chara's tiddy!
POST MORE CHARA!!!
Toriel took the wrong turn in the ruins.
Good genes
Muffet w/ dirt(?)
God of Hyperbacksack [Arashidrgn]
Ten Years Is Not Enough! (Undertale X Virtua Fighter) - Scrambles

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