In the modern age, Many of the old warrior ways have died out. The Knight, The Hopilite, The Roman Soldier, Samurai and finally shinobi. These stealth based warriors were invaluable to the Shogun and daimiyo. They were useful in dealing with many an enemy, both mortal and...yokai. The Shinobi were often the ones charged with handling the malevolent entities, Yokai. Over time, modernization whittled away the number of clans and some of the old ways. eventually, the only Clan left that still practiced, if in secret was the Kina Clan. The last Shinobi clan, charged with being the ones who face off against [those who would prey upon humanity and their enablers. And a group of young Shinobi, the heir to the clan and those she directly works with, are about to be right in a crucial moment.
Pair Ideas(can use one or more):
The Ace Heiress x A mediocre at best ninja
Cougary Mentor x younger guy
rough around the edges Lancer x Someone empathetic
Younger techie x Older ninja