Kyuutarou ga Yattekita!

There's going to be a new student in Tesukayama School. To everyone surprise, that student is a girl, a ninja girl. Her grandfather died and she's the only one left in her ninja clan. Kyuutarou never been in a city before, since her sibling died when she was little, she's always live in the jungle alone with her grandfather and her dog. She never go to school, her grandfather is the one who taught her everything. Motoi whose his father is also the school director is asked by his dad to take car...