在一个宁静的夜晚，一列特快列车沿着海岸行驶。在火车的一个车厢里，三木被压在一堵墙上。她一动，就能听到锁链叮当作响的声音。她哭着向列车员乞求怜悯。

列车员的名字是清次，这列火车是他的训练营。

A rumor spreads among young people that if a person gets on "that" train, he/she will disappear.... Most of them don't believe it, but it exists.... It's called Michishio. Michishio was invented to train young girls and make them sex slaves. At first sight, the train is completely the same as a normal train. However, it shows its true self once in a few months. The girls who get on the train are severely trained and become sex slaves.... Seiji is a train conductor. He can do whatever he wants to the girls on the train since he has a special training ability. And another Michishio now departs....

고요한 밤바다를 달리는 특급열차. 아무도 없는 차내 갑판, 벽에 얼굴을 밀착시킨 미키의 가슴, 쇠사슬 소리.

미키는 나약하게 이쪽을 바라보며 "이제 용서해줘요.......할 말은 할 수 있으니까......."

내려다보는 세이치 "이제야 알았군요, 당신은 이 열차의 우수한 부차장이라는 것을요".