[relentlessflame]

Hopefully this will save some time for everyone going forward...

PLEASE READ

1. Yosuga no Sora anime will be told in a branching/"Omnibus" format. This means there'll be a story arc for each of the four main heroines (Kazuha, Akira, Nao, and Sora).
2. This is confirmed by the official Blu-Ray solicitations, and the ending of episode 4.
3. The structure of the episodes is listed here. Episode 1 is common to all routes, Episode 2 is common to Kazuha and Akira, and Episode 7 is common to Nao and Sora. Including the common episodes, all arcs have 4 episodes, except for Sora's arc which has 5.
4. Motoka's story is being told, to the extent that it will be, in the omake section after each episode. (Incidentally, the second ED in each episode is for this omake segment.)
5. Kozue's story will not be told as one of the main routes, but it's possible (unknown) that she could take over the omake segments in the second half of the anime (episodes 7 through 12). (So far Motoka's story has continued all the way through.)
6. Show a little courtesy and catch-up on the thread before you post so you don't ask the same question that's already been asked. If someone asks a question that has been answered by this post, please link to this post.