A very dark plot

Character A proposes to Character B. Character B says no, and run away (we’ll think of a reason for it in the moment of rping!). Three years pass, and then Character A sees Character B on the street. They chase them down, but lose B. Character B, frightened, tries to run away again that night but when they open the door, Character A is standing there. Character A will do anything to make sure Charcter B never runs away again. This will have heavy themes like maybe non-con, kidnapping, manipulating, just very the dark stuff! I've just been in the mood for something dark and nasty 

I’d like to double for this plot please, so that we can both play a top and a bottom so that it's even~\!