[]!SPOILERS![]
Yinbi household. (hidden household)
Bloodline gives members a predisposition to be ignored by others until they reveal themselves. This stacks with every member in an area. The ancestral home of the Yinbi clan is completely hidden in plain sight. The clan in ancient times was just as obscure as it is today, though it was home to the best thieves to exist. The clan is now a clan of mortals, a decision made to keep them from being discovered as their obscurity from their bloodline only worked when they were mortals or equivalent. They left behind a special grimoire and sealed the ability of those of the bloodline to contract with one unless they had a concealment Inherent Skill. In addition to innately being ignored, all clansmen feel a sense of belonging to one another as a way to keep the tendency of a thief from causing issues. All desires that could be considered evil or a reason for conflicts such as pride, lust, or envy and such are directed to outsiders, those not related in any way. Marriage into the clan exempts them from the sense of belonging but is also bypassed when the less than savory emotions are redirected. This does not end conflict within the clan, but mitigates it so much it would never cause a problem.
Yinbi long (hidden dragon)
Our main character. Partially insane, though he does not recognize it himself. Completely normal when facing his waifu and daughters, but an unhinged madman when not with them or in his clan. He does not notice the change.