The book is a visual novel about a boy who is suffering from hallucinations. He has no recollection of his life, and he spends his time looking at the faces of other people. One day his father goes to see him in the hospital, and he discovers that he has no family or friends. Although he doesn't remember them, all are involved with him - including his parents and their friends - but they are dead.The narrator does not know how to explain these things to other people because they don't fit into the general concept of what a normal person should be like. The story focuses on this aspect of human psychology, with the narration repeating itself as if it were just another part of the scenery for each chapter.