Shinkansen de Nani shiteru!?

Hikari Tamashiro is a 41-year-old housewife with two young children. Sota Honda, a 24-year-old employee riding the bullet train to Osaka on a business trip, meets Hikari, who is on her way back home from a friend's wedding in Tokyo. Hikari, who is extremely drunk, goes too far playing around with Sota's massive erection. Not to be outdone, Sota displays all his techniques on Hikari's body. Their actions escalate as they move all over the train and reach a point of no return. All hands aboard, the horny train is ready to depart!.