Buffy is meeting Angel for the first time in episode 1.01 when he is following her through the dark streets. She kicks him and found out that he is a vampire and got a silver cross from him. Later she recognize how difficult it is so be in love with a vampire, but they are having a relationship anyway. In season 2 situation chance after they made love on her birthday. Angel has a moment of luck and turns back into Angelus. Buffy must fight now against him. At the moment as she needs to kill him because he opened the door to hell, Willow can create his soul again. But the door to hell is already open and so Buffy kills him and sent him to hell. She is leaving the city... After some time she decides to come back but she stills can't really handle the whole situation. To make it easier for her, she puts the ring, she got from angel, back to his old accommodation where she killed him. But Angel is coming back from hell and Buffy finds him . . .