Urara Sakakibara

Kaoru, a private tutor, arrived at the home of Ai, a high school dropout studying for the university entrance qualification exam. The two quickly became close, like sisters. Kaoru had a boyfriend named Fukao, but on the day of a long-awaited date, she discovered he was cheating on her...

Years after retiring from their formidable ninja lives, a dysfunctional family must return to shadowy missions to counteract a string of looming threats.