Himawari!

Himawari Hinata attends Shinobi Gakuen to hone her skills as a kunoichi, driven by her childhood experience of being saved by a ninja. On her first day, she encounters Hayato Madenokoji, a transfer teacher who unexpectedly saves her life. What initially appears to be a coincidence is that Hayato shares a distinctive mark with the ninja who rescued her years ago, sparking Himawari's curiosity about their connection.