Himawari Den!

Himawari Hinata enrolls at Shinobi Gakuen to train as a Kunoichi, driven by a childhood experience in which a ninja saved her life. On her first day, she meets Hayato Madenokoji, a new teacher who lacks ninja abilities and is at the academy to settle a personal debt. He teaches students about everyday society. During an incident, Hayato saves Himawari’s life. She becomes intrigued when she observes a mark on his neck that matches the one from the ninja who rescued her years ago.