Riho Asaoka was at the forefront of the investigation to expose the heinous drug trafficking organization "Kurankai".One day, she heads to an abandoned building where she had a tip.However, it was a trap set by the Kokurankai who were planning to capture Riho from the beginning.She desperately feigns her bullishness in front of the criminal, but she loses her reason as she becomes immersed in pleasure.And the "sex beast" lurking in her wakes up.