After losing her father, Ran lives with her mother, Sumie. One day, while Sumie is away on a trip, a man arrives. He claims to be Sumie's former boss from when she worked as an office lady. The man's expression grows increasingly menacing as he reveals that he was once rivals with Ran's father for Sumie's affections. "I lost out in love, and was caught raping Sumie in front of your father, spending twenty years in prison!" he snarls, before attacking Ran...
