A Hybristophiliac's wet dream, The Beast Must Die tackles the trials and tribulations of falling in love with a Psychopath. It contains an all around great crime and mystery subplot that highlights the good and bad of Moo and Kirin's relationship. It's not a love story, it's a story of acceptance, obsession, and possession, but that is close enough to love for it to be on this list.
The furthest thing from a love story, this is a sex-fueled imprisonment rape fantasy. It's the darkest of the dark. I hate to love it, and I love to hate it. The captor is irredeemably shitty in every way and the captive is a thin line between stupid and pitiful.
Incidentally Living Together