Slimy Tentacle Lovin' -Room 69 at Imprisonment Net Cafe- | Tomihiro, | Renta! - Official digital-manga store
There is a net cafe where male customers are greeted by the female owner whose very golden smile brings them back again and again. Ohno, a man with unfortunate looks and frequent customer of the establishment, suddenly finds his arm has morphed into a tentacle! Having been mercilessly bullied and despised all his life, he has never experienced a single day of happiness. In desperation, the broken man does the unthinkable! In the backroom living space turned carnal prison, he fights to bring the tentacle under control! And so, the net cafe transforms into a cruel prison of tentacle training!