In the face of justice, there are no taboos that should not be violated. In the near future, humanity is in the depths of fear due to the onslaught of monsters. To protect world peace, the United Cross Rangers will enforce justice today. Or so it was supposed to be. Cross Red, also known as Akama Retsuo, is a man who is passionate about justice. With an overflowing sense of justice, he commits a taboo one night with Cross Pink. And so begins the days of muddy, terrifying, immoral and ruinous. A suspenseful story of justice and immorality.