Inside the house
Soya already has the household Isou. Hakuri cannot use it until he stops scattering his own spirit energy. Their clash is one of the rooms the Rakuzaichi actually spends, not a hallway gag. Selection, Greeting, Wall, Duty: the weekly titles around them are clan vocabulary.
Hakuri is leftover. Soya is heir. Tamaki is the lie about Soya. When the auction ends, Hakuri holds Isou and the Storehouse. Soya has amnesia. The bonus chapter asks for those memories to be gone. This desk does not rewrite the heir as kind.
Why it is a fight desk
The pair is logistics and a grave-shaped extra. Chihiro needs a mover. The clan needed an heir. The book spends pages so the leftover can become the Kura. See the pair room and Isou.
Official chapters live on VIZ or MANGA Plus. This desk does not host pages.