Yasuuchi is an ordinary businessman who is riding the train when he spots the slightest bit of cleavage of a cute girl. After noticing "her" cleavage, he eavesdrops on a text message conversation the girl is having with her friends. Reading the message he is caught by the cute girl and she black mails him into seducing her or she will post pictures of him, calling him a train molester and a pervert. Does Yasuuchi have much of a choice? It does not seem so at this point on the train ride to work.