Found a good one!
If someone can post translations to all the pages, that would be awesome.

http://seiga.nicovideo.jp/watch/bk43020#playing
page 343

From what I see it's about a school girl dullahan that's the new girl in class.
Everyone thinks she looks freaky, but except for one boy.
Too bad it's a One shot I think, but this entire manga has headlessness on every page since she can't reattach her head at all.
She wants to get close, but I think her body keeps doing stuff out of her control lol

Just log in, and you should be able to go to the page!