I don't really remember much but I read this manga a year maybe two years ago.
It involves two siblings who are moving to the countryside (or mountains) to live with distant relatives (an older couple). There is this selfish (kinda hot headed) God (the word Tori comes to mind) he wants the elder brother to inherit the family name.
There is a scene where the girl (sister) gets lost in the forest (mound of tears... Saddness...?) And she befriend another girl that can turn into a dog...?
