Explanation for the specials, given by **Mistywing (TVDB, Moderator)**.

>The specials are duplicates of the corresponding episodes of the first season.

>They are created this way because the short series length dictates that certain episodes must be reused or viewed in a certain order to establish a complete romance route for one of the girls.

>It is simply for convenience of ordering things when scraping metadata IF you choose to duplicate the common route episodes in your files.

>If you were to do it, you would have the following files:

>Migiwa Kazuha Arc I: Distant Memories
Migiwa Kazuha Arc II: Akira Embarassed
Migiwa Kazuha Arc III: Unjoined, Unseparated
Migiwa Kazuha Arc IV: Haruka's Heart

>Amatsume Akira Arc I: Distant Memories (Duplicate of S01E01 - Special S00E01)
Amatsume Akira Arc II: Akira Embarrassed (Duplicate of S01E02 - Special S00E02)
Amatsume Akira Arc III: Darkness Brightens
Amatsume Akira Arc IV: I Won't Give Up

>Yorihime Nao Arc I: Distant Memories (Duplicate of S01E01 - Special S00E03)
Yorihime Nao Arc II: Sinful Maidens
Yorihime Nao Arc III: The Sky, Still Dark
Yorihime Nao Arc IV: Distant Feelings

>Kasugano Sora Arc I: Distant Memories (Duplicate of S01E01 - Special S00E04)
Kasugano Sora Arc II: Sinful Maidens (Duplicate of S01E07 - Special S00E05)
Kasugano Sora Arc III: Imitating the Bird's Cry
Kasugano Sora Arc IV: The Uncertain Pair
Kasugano Sora Arc V: To the Distant Sky

>Notice that with this arrangement, all the girls have every part of their respective stories listed. This is for your convenience if you do not know from which point of the common route the corresponding girl's story branches off from.
If you do know where things branch off from, there's not really a point to arranging your files this way and using more disk space for storage.