A novel about a writer, nicknamed Kogito, and his grown son Eeyore, who has a disability and loves music. Through their daily life, the narrator reflects on his family, on the poet William Blake, and on how a father may understand a child who lives differently from him. Memories of his own father and of wartime Japan weave through the story. The book is quiet, allusive and tender, and it belongs to the long series of Ōe's works inspired by his relationship with his son.