It may seem strange after playing quite a lot of sequences of manga porn parody minigame string"Milk Plant" (starring buxomy Tifa Lockhart!) To have an vignette numbered as"zero" but only if you don't know the japanese language and if you didn't actually following the story. Adn yes, behind all these hardcore and sometimes quite tough interactive bdsm themed manga porn scenes thare was a story and the origins of it you will figure out from this zero vignette! In just a couple of words Tifa's adventrues have begun when she decided to drop down some mysterious proffessor but during one of her spy missions she got captured and now she is spending quite a lot of time together with this proffesser which as you have most likely already gueesed turns out to be the player!