Just when Akari thought her happy life would continue after her father remarried, her stepmother was scammed and she was suddenly drowning in debt... Then her parents force her to help the family, and she is sold to a perverted billionaire for a month... To help her build up her tolerance, her creepy stepbrother makes love to her and makes her cum over and over again... However, as he treats her kindly despite his perverted play, Akari's hunger for love grows and she becomes dependent on the billionaire... She abandons her parents who used her and didn't love her... and becomes his slave.