Summary 1: The protagonist has been giving blood to her vampiric childhood friend for years. He has always been a bit aloof, and she never knew what he was thinking, but ever since they're grown older, and she's starting working, he has become increasingly clingy and aggressive. Finally, his long pent-up true feelings burst forth, washing over her in a wave of forced pleasure…
Summary 2: After her vampiric childhood friend attacked her, the protagonist hasn't really spoken to him. Unable to stand the awkwardness, she talks to his little brother to see if he can mediate the situation. "Become one of us..." he tells her. It's an invitation... an invitation to live with her friend for all eternity. To the two of them, a world without her is little better than death. And once more, she's assailed by supernatural pleasure as she grapples with her feelings...