A girl who has begun to find her days boring, happens to visit a basement where illegal drugs are sold. However, what she is forced to inhale there is pure poisonous gas. In the midst of the pain of the poisonous gas, she clings to pleasure as if seeking relief... Nanami Yokomiya, about half a year after her debut, uses her entire body to express the hellish pain caused by poisonous gas. The AV that is currently the most packed with her body, Kokoro, and eroticism is "Poison Gas/Aphrodisiac Brainwashing Experiment". It's a masterpiece!