Senbon Matsubara: Kawa to Ikiru Shounen-tachi

A village in Shizuoka, Senbon Matsubara, unites to prevent future flooding after a devastating deluge in 1753, focusing efforts on the Kiso, Nagara, and Yuhi rivers. Meanwhile, residents of Satsuma in Kumamoto Prefecture struggle under the burden of forced labor imposed by the central government, hinting at growing resentment that would later contribute to rebellion.