The anime is consist only of 6 episodes and already has a Live-Action drama, it is not confirmed that the cast of the Live-Action Drama will cast for the film.
Yuichi is hospitalized due to hepatitis. Randomly he would try to escape from the hospital but would get beat up by the nurse. One day, he happened to meet Rika at night in the hospital hallway, a girl of his age, that stays in the next building. He was fascinated by her beauty, but she was very selfish girl. Although she led him by the nose, he began to be attracted by her. However, when Rika told him about her illness, he knew why she acted so selfish; she didn’t have long to live.
Description from ANN