undertail, gill play, gills, undyne, NSFW ish?, neck play, I never know how to tag this shit, alphyne, bite marks
published on: 2016-03-01 16:40:02
undertaild.tumblr.com/post/140275219681/
undertaild.tumblr.com/post/140275689011/
undertaild.tumblr.com/post/140278969566/
undertaild.tumblr.com/post/140278990306/
undertaild.tumblr.com/post/140301156986/
undertaild.tumblr.com/post/140349012811/