"Omega" is a gender that possesses both male and female genitalia. It is a mutation that occurs in one out of every 100 million people. A characteristic of this gender is that they periodically go into heat during adolescence. Research into this gender is being conducted worldwide, but since the absolute numbers are so small, it is a gender that remains shrouded in mystery... One such omega, "Aoi," has finally hit puberty and begun to go sexually out of control... and she has become an aggressive sadist...