Ok the opening of this fic is that Ranma is protecting Akane from a thug with a gun. In the end he(she) dies when Akane tries something foolhardy (i.e. angering the gunman). Now it’s up to the writer if Ranma still lives at this point. In one Ranma is completely dead in the other one side of Ranma dies. Gantz either way will transport Ranma to the Apartment.
In gantz it starts Canon with the same monsters and people except for the starting main characters are replaced by (Ranma, Ami Mizuno in my cross idea, and possibly Ryouga).
In any case the main difference with this Ami Mizuno is it uses the Cameo appearance from The Dark Side of Life basically a down on the rocks apparently drug using Ami. My reason for it is it serves as a transition phase for Ranma later. Any case she's a pot head and it’s due to what happen. (Takes place after SM) after the senshi defeat the final enemy the group basically splits up.
This is due to there being no final threats to Crystal Tokyo and it not happening for awhile. So off the rest go do there things (such as Usagi going with Mamoru to America, Minako goes to be an actress, etc). The only one that stays around with Ami is Makoto (up to you if they were lovers or friends) and eventually even she leaves (whether it’s from fights, not working out, or just pursuing something). This leads to Ami's depression and with being an outcast at college she turns to drugs. Eventually she is beat and raped till finally killed.
When Gantz brings the people back. It follows similarly that Ami is about to be raped. Ranma of course seeing this acts on it and saves her. This leads Ami to feel indebted. When Gantz issue the suits he doesn't take it since it doesn't look manly. Gantz transports them and it takes place pretty much canon.
When Ranma realizes that these Aliens are killing people (even if not very morally good people) he finally stops them. In the end only the main characters are left with Ami almost dying, but barely makes it past. This plot point is to change Ranma's character radically.
When Ranma and Co. are back Ami in gratitude offers him a place to live, but he declines saying that he has to get back home. Here is where it’s tough for me on how to proceed. The goal is that he basically forced out of the Nerima prefecture (anywhere from being an imposter, to a Ranma already their male or female) and eventually stumbles upon Ami and catches her trying to get high.
Ranma here serves as an anchor for Ami (who by the way the addiction is gone considering Gantz gives you a second life). Vice Versa Ami serves as an Anchor for Ranma since she looks like an Akane, but is much nicer. A relation here could develop or she could just serve as a good friend that tutors Ranma.
Continuing story line it continues with more Gantz mission etc. At this point it’s open ended and if you felt inclined you could even start to bring back in SM, etc with maybe even Gantz serving as the enemy this time or something.
*A little note is that at some point during the first arc you have to make sure for Ranma & co. to find out about the explosive device in there head since I doubt you would want them to die by trying to tell friends & family
Obviously this ideal isn't completely fleshed out and I probably with my meager writing talents couldn't bring it to its full potential. However I would be glad if someone took interest to make it into a great fic
(please don't be to harsh with the Ideal, but Comments & Criticisms are welcome and of course if someone decides to adopt it ^^)




