After Gonta is left behind reluctantly by its family in Namie, Fukushima during the evacuation due to the 2011 Tohoku earthquake and tsunami disaster, Gonta's family rallies a rescue team to save all the pets left behind.
Humans lived together with spirit youkai in ancient times. But because demon youkai decided to control humans, the two kinds of youkai fought in a violent dispute. At that time, a swordsman appeared who taught both sides a way to battle without killing each other. From then on, until the day when the winning side removes a seal from the losing side, they possess a great power in the human world. And now the bamboo flowers are in full bloom, so the day to remove the seal has come. Now the power lies with the winning demon youkai who proclaim they will maintain eternal control over humans in the next battle. But victory or defeat lies with the supreme commander who must be a human child this time. The head of the spirit youkai Nurarihyon forsees that and commands that Maya search for an appropriate human child to be the supreme commander.
At a young age, Nitaroh is stricken with an illness that leaves him blind. He inherits the shamisen guitar once used by his mother and is taught its basics by a blind travelling shamisen player. In time with the help of friends old and new, he walks the paths that leads to his ultimate fate - that of founder of the Tsugaru style of shamisen play.
Some time after a space mission to Mars ends in destruction, strange monsters called "Ancients" begin appearing around Tokyo. A group of specialists consisting of three girls and one troubled young boy must fight the Ancients until they can come to understand exactly what it is they are fighting. When one of the Ancients tells them that they are the true invaders of Earth, they must search within themselves to grasp what truly is reality.
The Saigo no Kotoba book follows Kawashima's life after her mother's death, and her pursuit of her singing dreams by performing free concerts on the streets of Tokyo's Shibuya district.
