In the midst of the Sengoku Period, in the beautiful land of Hinode, brave samurai Mushashi and his beloved Otsu find themselves facing the looming horrors of war. As duty calls Mushashi to the battlefield, he promises to return to Otsu, vowing that their love will withstand the trials that lie ahead. With the fleeting beauty of the sakura trees as their witness, Otsu clings to hope and patiently waits for Mushashi's safe return, while he grapples with the harsh realities of war. Their enduring love and devotion become a guiding light amidst the chaos of battles, with cherished letters exchanged to keep their connection alive.