A slightly bad plan to get into the female-only vehicle during school hours and ask the reaction of the school girls. The schoolgirl is curious about the man who got on (pretended) by mistake, and when he provokes it without being noticed by the people around him, he can't stand it and gets an erection. Triggered by an erection, the schoolgirl's mischievous heart turns into excitement, and the man reaches out to the erection.
