A superb massage work by Ryoko Iori, the god hand who can make anyone cum with a testicle massage! The intelligent and seductive Ryoko Iori gives a thorough lesson on the structure of the testicles, how to massage them, and their effects! For those who can't understand in words, she will explain it in practice. She kneads the testicles with the perfect amount of force, and uses the overflowing pre-cum as a lotion to stimulate the erect penis! Ryoko's body reaches a climax of pleasure with an intense double attack with apprentice masseuse Yumi Kazama and hot sex with a patient!