While reading, he imagines half of Seigetsu's life till his death, sees his and YAMAI's reflections in it and was buried in thoughts, which is the outline of the story.
そして、井月の半生をその死まで思い描きつつ、井月に自らや山井の姿を重ね合わせ、感慨にふけるという筋書きになっている。