On a June day, we visited an izakaya in central Tokyo and met a man we had previously encountered six months earlier while investigating a guerrilla underground brothel in Shibuya. He now runs his own illicit sex business and, due to booming profits, invited us to conduct an undercover report. The operation, once run out of a Hiace van, had since been upgraded. Intrigued, we agreed to meet him again two days later.
The location was Ikebukuro. A minibus parked on the street immediately stood out as suspicious. Passersby honked in confusion before the man finally appeared. Boarding the vehicle, we saw beautiful young girls in uniforms waiting behind a one-way mirror. They were relaxed and completely unaware of our presence.
Through the magic mirror, we witnessed lewd posing, upskirt shots, wall-separated deep kissing, blowjobs, lesbian play, and vibrator masturbation—various perverted acts unfolding before our eyes. Watching their obscene behavior, our crew couldn't help but indulge in self-pleasure. The true appeal of this establishment seemed to lie precisely in this voyeuristic experience.
But the man wasn't finished. Depending on negotiations, direct sexual contact with the girls was possible. This mobile underground brothel operated on a temporary, pop-up basis. Prices were written on a whiteboard, and after haggling, the man—skilled in negotiation—adjusted the cost according to our demands until a deal was struck. We then stepped through to the other side of the mirror.
The girls, already involved in numerous perverted acts, greeted the man with dirty smiles. Stripped naked on the spot, they eagerly pleasured his erect cock with their mouths, played with his nipples, and fondled his body with apparent delight. What followed escalated further, allowing us to fully experience the terrifying intensity of this mobile underground sex bus.