Lilia Kojima

Only those with a great imagination can see the mystical railway known as the Rainbow Line, on which runs massive trains known as Ressha are driven by five warriors. These five warriors, known as the Ressha Sentai Tokkyuger, protect Earth's peace from the evil forces of the Shadow Line. (imdb)

One day, Itsumi Shiraishi dies at Seibo Maria Girls High School. Itsumi is the daughter of the administrator at the school and she was envied by all the other students there. At the time of her death, she held a lily of the valley flower in her hand. Itsumi was the president of the literature club. A friend of Itsumi, Sayuri, is now the president and she holds a regular club meeting, reading stories written by members. The theme of the meeting is "Itsumi Shiraishi's death".

Akari Inoue and other students are kidnapped and incarcerated. They are forced to participate in a game of kill and survive. The last survivor will receive one hundred million yen.