Loveless(2004)

Chloe Jones is Loveless. She's just following the rules! Rule #1: No names. Rule #2: You scratch my back, I scratch yours. Rule #3: No kissing. Rule #4: Anytime, day or night. Rule #5: Don't fall in love. Fella and Lady have a relationship based on five simple rules. But when Lady's old flame comes back into her life, fella realizes he's broken the most important rule of all: Don't fall in love.