Nana (18), a girl in the sports club, switched from commuting by bicycle to commuting by train after retiring from club activities. In an unfamiliar crowded train, she notices something touching her buttocks. For the first time she met a filthy ●. In her life so far, which was far from her sexuality, I can't forget the pleasure given to her by her filthy... Nana is getting more and more absorbed in dangerous play.
