After 30 years as a manga editor, Kazuo Shiozawa suddenly quits. Although he feels early retirement is the only way to atone for his failures as an editor, the manga world isn't done with him.

On his last day as an editor, Shiozawa takes a train he's ridden hundreds of times before to impart some last advice to a manga creator whose work he used to edit. Some time after, he is drawn to return to a bookshop at the request of a junior editor who wants Shiozawa's help dealing with an incorrigible manga creator who refuses to work with any editor but him. For this manga editor, Tokyo these days is full of memory and is cocooned in the inescapable bonds between manga creators, their editors, art, and life itself.