The wife of a producer's friend attends a meeting. With no suspicion, she participates, trusting her husband's social connections. The project involves married women gathering their mom friends to collectively brainstorm erotic ideas. The wife enthusiastically contributes from a married woman's perspective, generating increasingly lewd concepts. Ultimately, she becomes a dummy for filming, tied tightly to a chair. By the time she realizes what's happening, it's too late—her pleas to stop are ignored as the explicit scenes continue relentlessly. This work captures the shocking moment of an extraordinary sex slave's birth, known as the "lewd mother chair."