AVSA-112 Chastity belt abstinence training: Day 30 release explosive sex. Sadistic boyfriend forces chaste belt on beautiful OL Reiko Kohayakawa.

Rieko, a beautiful and talented office lady working for a listed company in Tokyo, had a boyfriend named Shigeki living with her. He was a good-for-nothing man who spent every day playing pachinko instead of working properly. The docile Rieko always obediently listened to whatever he said. One Monday morning, Rieko woke up feeling something strange in her lower abdomen. She pulled down her nightgown to check and found that a sinister 'chastity belt' had been fitted on her...!