International secret agent Amane Michelle comes to Japan to investigate a dangerous new aphrodisiac that originated in Japan. This drug is frequently used in molestations on trains, becoming a social problem. Michelle acts as a decoy for her investigation, boarding a crowded commuter train in the city center. A man from the organization forces his fingers, covered in the new aphrodisiac, into her panties, causing her to experience withdrawal symptoms and orgasm. She suddenly finds herself in the enemy's hideout. Her body is unable to resist. Her cunt is unable to refuse...