Izumo branch family Earth of the Osakabe household, whose homeland is in Kannaoi, it had divided in the past, and as a result, the was Ikusabe household born. 

Ikusabe works as the sword and shield of Naoi, and as a branch family, they have been serving under another household and as time went by steadily increasing their influence.

the present day, the influence of both households are now equal standing, and when the topic of having a relationship of equal standing was brought out, it didn’t go well and became a muddy start.

The branch family that was cut off had gained power in order to be recognized by the main family, but they not acknowledging their efforts