Yaegaki Meguru's next door neighbor is unique, to say the least. They are the Kusanagi ninja lineage, and their son, Kanata, has been her classmate and friend since their younger years. Kanata would always get into trouble or be late to class due to his ninja upbringings. Every morning, Meguru would have to pull him away from his training with his father. Most days, he's late to class anyway.In the past, they both vowed to never hide secrets from each other, yet Kanata would not reveal the "true purpose of a ninja." Meguru understood the reason behind Kanata's secrecy regarding his ninja background when a powerful force is released inside their own school. Then, Kanata will reveal his true potential as a ninja.