The editorial team of Jitsuwa Knuckles has managed to secure an exclusive first-look at the reality of Japan's underground sex industry, using information obtained through secret channels! From raw sex and creampies to aphrodisiacs, piss play, threesomes, and forbidden encounters with underground idols... After days of negotiation, we've secured this one-time exclusive reveal of the hidden darkness of Japan's nightlife, on the condition that the specific shop information remains confidential!