Spike as Bodyguard?

I don't remember much but I think it starts with Buffy in LA before she becomes the slayer and Spike is hired by maybe Wes to be her bodyguard. Later when she becomes the slayer and moves to Sunnydale she makes a deal with Spike to help train her(For Blood?). Also I believe Spike helps her with her watchers test and at the end they are living in an apartment.

This is Sideways by Goldenusagi. It can be found here on SR.

That's the one thanks.