Childhood friends Mizuki (21) and Sho (25) go to Sho's family home to look for a job. In contrast to her father, Kozo (66), who warmly welcomes her, Mizuki learns that her brother, Satoru (36), is a recluse. The next night, with Sho out of the house, Mizuki shares a drink with Kozo after her job interview doesn't go well. When Mitsuki finally falls asleep, Kozo carries her to the bedroom and, unable to resist her voluptuous body, rapes her. The whole incident is recorded by his brother...