A gruesome molestation incident that hit a female college student. Two years later, Yui's mission as a molester undercover investigator is to become a decoy and arrest a red-handed perpetrator to eradicate molestation crimes. She resists, but continues her investigation only out of a strong hatred of her molestation. Meanwhile, she gets information about the route bus that the molester group is aiming for. Yui gets on board to escape from the eradication of the organization and the curse of her past. But it was a 'decoy bus' prepared by a group molester organization...
