One day, a married woman named Marina was groped on a bus and, to her dismay, felt aroused. A perverted man who had seen this blackmailed her into being raped at her home. Afterwards, with her weakness held against her, Marina is forced into humiliating exposure training. Despite feeling guilty towards her husband and overwhelmed by shame, the man's training awakens her hidden masochistic nature, causing her to fall into sexual servitude…！！
