The ending is not necessarily a tragedy. In fact, the ending of any novel could be a tragedy or a comedy, depending on the author's plot design and the reader's interpretation. However, if the novel was called " Two Boundless ", it would usually end in a sad story because the name itself had a certain emotional color. However, the plot and ending of the novel were created by the author. He could decide whether to consider it a tragedy according to his own preferences and interpretation.