Welcome to the Hellmouth, Again! - A Buffy...
Will take place during Season 7's 'Empty Places.' Buffy makes a wish that has disastrous consequences. She wishes that she never changed out of being a Vampire from Billy Palmer's dream. That it will become real and forever with no spell to end it so that way she can't feel anything for anyone because they kicked her out and didn't want her, the real HER.
Well, it comes true and she is sucked into time to Season 1 and after they save Billy (AGAIN), Buffy remains a creature of the night. With a soul, she shuns out the Scoobies by talking to the Master eventually becoming his favorite childe and receiving special treatments more than the Scoobies ever gave her. She enjoys being a Vampire very well and is quite good at it, choosing to be evil rather than the soul forcing her.
She has no curse to stop her unlike Angel.
The Master is left unstaked and takes over Sunny Dale along with Buffy who finds herself interested in Spike. He is to come and help them deal with the new Slayer.
In colloboration with @CherrySodaFan.