Fall Into The Blue (2006)

"Good friends turn to lesbian lovers, but can their love blossom when they have to cover up a terrible secret?"

Yasuko and Shizuka, friends and coworkers, come to be so much more after a terrible incident involving Shizuka’s boyfriend. After an intense fight that left Shizuka with a black eye, she takes her revenge by bludgeoning her boyfriend in the head, leaving his lifeless body on the bathroom floor. Yasuko pledges her support to Shizuka and tells her its all going to be ok, and that she will help take care of the body. The two women share a bed while staying with Yasuko’s sister, and things start to get hot and heavy.