Kaede and Shuichi, the bull killers
They travel around the world luring attractive men into hotel rooms using Kaede's body and Shuichi's money
Afterwards, the victim is forced to have sex with Kaede while Shuichi watches and films for the entire night
Once the act is done, they kill the victim usually by blunt force to the head and leave the place for the maids to find
The police is looking for any clue you can give on the location of these two sick perverted killers