Chigachi Fuuta an ordinary high school student who really admires ninjas is gifted with an extraordinary legacy, namely the soul of Hattori Hanzo, a legendary ninja. But because of that legacy, Chigachi Fuuta is targeted by various shinobi and ninja who still survive in the modern era. Can Chigachi Fuuta overcome these obstacles?

I’m Shinomiya Hokage, a 3rd-year high-school boy who dreams of a survival life. One day, everyone in my school transferred to a mysterious island in a parallel world. I woke up in an unknown cave and I started moving on my own. Then, I met up with some of my classmates. My knowledge and tools in survival shines through. I was a plain guy in school but I’m the leader in this world.