Fanfic of origin: http://archiveofourown.org/works/7708513

Yeah, yeah, I know; this scene's story of origin has already been posted many times across the Internet...but dammit, this fucking scene is just too goddamned good for me to pass up on the opportunity of making an additional post just for it alone.

If you ever wanted to see some uber-hot Giantess Alphys X Undyne action in all of its unbelievably fetishistic glory, then believe me, son; you've definitely come to the right place.