Himawari!

Himawari! (ひまわりっ!) is a Japanese anime series created by GoDo, directed by Shigenori Kageyama, and produced by Genco. It was aired on Chiba TV from April 8 to July 1, 2006 and afterward got a second season, Himawari!! (ひまわりっ!!,), and an interval short manga, Himawari-den! (ひまわり伝っ!).

Plot
Himawari Hinata recently transferred to Shinobi Gakuen to train to become the best kunoichi she can be. She wanted to be a ninja ever since she was rescued by one when she was little. On her first day, she was rescued by Hayato Madenokoji, a new transfer teacher who does not possess any ninja skills or traits, but instead teaching the ninjas about normal society to pay off his debt. However, Himawari notices that Hayato bares the same mark on his neck as the ninja who saved her when she was young.