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Classic overview

A married couple who enjoy an exciting sex life together. Their favorite part is molestation play on the commuter train. This morning, the husband molested the wife, and the wife was satisfied, and in return, the wife became a slut and made her husband ascend to heaven. Although the couple's relationship is harmonious, the husband and wife are looking for a stronger thrill, and they are also enjoying their sex life with their lovers. The wife's lover is the boss of the company where she is dispatched. However, this boss has a perverted habit and his demands escalate. Then one day, he realizes that she likes to be molested on the train, and takes her into a crowded train. The wife accepts the fingers of someone other than her husband for the first time on the train...