Office lady Kanae (Mia Masuzaka) witnesses her junior colleague being molested on her morning commute. The junior confesses, "At first I was scared, but being taken like a wild beast made me wet." Worried, Kanae tightens her guard against molesters, yet becomes increasingly aware of her own big tits drawing attention from the predators. Every day, both to and from work, she is relentlessly teased and assaulted on the train, until eventually her body can no longer function without the molestation.