[Beo]

Spoiler for future:

maybe a focus on the brother? ... maybe not, author seems to like the women point of view. Could be a shift from Sachiko/Yumi to a single character. The author has already put a lot of time in creating the characters and to an author these are her children. To drop them is to almost kill them. By creating a new series in the same world will save a lot of effort in creating a new world.