Japan, 1590. Following the death of Oda Nobunaga and Toyotomi Hideyoshi's seizure of power, the mysterious warlord Tenmaō and his fierce warriors terrorize the inhabitants of the Kantō Plain.

Takanori, from a yakuza family goes to prison for a crime he didn't commit. As soon as he gets out his brother brings him in for a robbery.

Middle-aged widower Tetsuro finds an unconscious, homeless young man on the riverbank in his small seaside town. Offering him room in his home, Tetsuro and the man who calls himself Shinichi develop a father-son dynamic, despite the secrets that linger between them.

Third-grader Himeno moves to a huge mansion in the country. However, she soon finds out it's a ninja house! The ninjas Akamaki, Aomaki, and Kiiromaki mistake Himeno for a princess and begin solving problems for her with their own unique skills. But that is not the full extent of their powers! When Aomaki and Kiiromaki combine, they form Midorimaki. Similarly, when Akamaki and Aomaki combine, they form Murasakimaki; and when Akamaki and Kiiromaki combine, they form Daidaimaki. Life with these colorful ninjas has only begun when they discover a large tornado heading for the mansion. What will happen to Himeno's family? Can the colorful ninjas protect Himeno?