Hotori: Tada Saiwai wo Koinegau

The story is about the growing friendship between a girl and a robot, who are complete opposites in many ways. While the girl, Hotori, is suffering from a fatal disease, in which she gradually loses all her memories, the robot, Suzu, is gradually gaining memories from the personality unit of a dead boy that has been transplanted into him. One day, Hotori asks Suzu to make a fateful promise... (anidb)