I'm trying to track down a short manga and I just can't seem to find it. The problem is that I read it a long time ago and don't remember the name. All I remember is:

The story involves a ghost fetus/baby that jumps into a girl and instantly makes her pregnant (or appear pregnant). The story gets even more hazy but I believe her and her friends try to get the baby to "pass on", it freaks out and hops into another girls body. The spirit repeatedly jumps from girl to girl and then to an old man at one point IIRC.

Hopefully one of you may know what I'm talking about but if not
would you be able to point me to a site that uses tags so I can search more efficiently?

Pic unrelated...