The reason why Takano-san and Tomitake-san were cursed is because they broke into the ritual storehouse.
I don't know how the villagers found out about it.
Maybe somebody was watching.
Maybe there was an anti-theft alarm.
Either way, our intrusion must've been reported to the highest level of the curse system.
That's because, considering the distance between the village and the site where Takano-san's body was found,
she must've been killed right after we came out of the ritual storehouse.
It was done very quickly.
It's possible that a special assassination team exists for this purpose, or that the plan had been set up a long time ago.
They might've been secret agents of the Sonozaki family, but the latter sounds more valid.
But if so, who would have been the victim if nobody broke into the ritual storehouse?