Though not blood-related, this brother always treated his sister Akane kindly. One day, after seeing off their father on a business trip and being left alone together, the stepbrother suddenly changed. The stepbrother's twisted affection turned towards Akane. She was confined to the room and tormented. Initially, Akane resisted, but she was raped and brainwashed by her sadistic brother, ultimately falling into a twisted love…
