Final Strife is a doujinshi featuring primarily Tifa, in numerous pairings. These include:

Tifa x some guy
Tifa x Cloud
Tifa x Aeris

The artwork is not particularly impressive. None of the characters, barring the possible exception of Cloud and Vincent, are very good resemblances of the video game characters. In addition, Tifa's tits are drawn to be huge, although I guess that can be expected from FFVII doujinshi. Having said that, credit still goes to the artist for detailed artwork.

I can't say much about the story as I don't fully understand what happens. In the beginning Tifa and a girl that I presume to be Aeris are getting fucked until Vincent shows up and saves them. Shortly afterwards, after Tifa returns home, she forces herself on Cloud. After that, Tifa runs into Aeris who seems to have some evil intent, and starts getting fondled by her which leads into some full-out yuri action between the two.

Overall I can't say I'm overly impressed by the artwork. It may be wortwhile to have a look at this doujinshi if you're a desperate Tifa fan. Otherwise, there are better FFVII doujinshi around.

This one is lengthy sexfest for Tifa.

The whole thing starts out verrrry uncharacteristically graphic/dark, involving prostitution, gangs, guns, murder, revenge. Basically with Vincent showing up, saving Yuffie, Aeris, and Tifa.... and Yuffie grabs the gun and caps every assailant with a headshot.

Then Tifa goes to Cloud for comfort.

Then Aeris humiliates Tifa.

The art was very average, and of varying line quality. This was likely done by different artists in one sequential story arc. All of the artists weren't impressing me all too much, but there is the length of the tale and the variety.

The tone was just too out there for a FF doujinshi, imo, although some may find the strange direction refreshing.

A typical example of mainstream FF7 doujin. Art is near sub-par, character likeness is to a bare minimum. This doujin holds little to make it a worthy view for a fan of the series. It, however, holds true to be an average doujin that is fine if youre only looking for action without real substance.