Every day when he returns home, he is attacked by his grandfather in the name of training. Shizuka Hoichiro, a descendant of a venerable ninja, is a first-year high school student who wants to escape from his crazy daily life. In today's peaceful world, ninjas are unnecessary. One day, as usual, he was devoting himself to his studies, sacrificing his high school life in order to escape from being succeeded as a ninja. His peaceful daily life changes completely when he meets Mikogami Kyoka, a girl who came to see Hoichiro as his "destined person." Kyoto incident-solving action by ninja x onmyoji buddy begins!!