Groper Train: I Love Sex!: Erotic work depicting the undisguised lust of a man and a woman. In a big city, there is a chance that a man and a woman who meet for the first time connect in a playful mood. Kayo hears from her friend about harassment in the car and wants to experience such an experience herself. The day has finally come when this wish will come true. Her partner turns out to be Masaharu, who has a chaste wife named Taeko. Masaharu is a good game technician, and when Kayo accidentally touches his body on the train, they immediately go to the hotel for a date…