These episodes do not form a single continuous story, but rather, 4 different stories based on different plot branches.
Ultimately, how these branches tie together, is explained in Haruka's inner monologue by the end.
THEY HAVE SEX AND GET CAUGHT RED HEADED BY THEIR FRIENDS AND TRY TO DROWN THEMSELVES WITH CUM
|Episode No.||Episode Name||Japanese||Romaji||Air Date||Route / Number|
|1||Distant Memories||ハルカナキオク||Haruka na Kioku||October 4, 2010||Akira / Kazuha / Nao / Sora 1|
|2||Akira Embarrassed||アキラハズカシ||Akira Hazukashi||October 11, 2010||Akira / Kazuha 2|
|3||Indecision||ツカズハナレズ||Tsukazu Hanarezu||October 18, 2010||Kazuha 3|
|4||Haruka's Heart||ハルカズハート||Harukazu Hāto||October 25, 2010||Kazuha 4|
|5||Darkness Revealed||ヤミアキラカニ||Yami Akiraka ni||November 1, 2010||Akira 3|
|6||I Won't Give Up||アキラメナイヨ||Akiramenai yo||November 8, 2010||Akira 4|
|7||Sinful Maidens||ツミナオトメラ||Tsumi na Otomera||November 15, 2010||Nao / Sora 2|
|8||Darkened Sky||ナオクラキソラ||Nao Kuraki Sora||November 22, 2010||Nao 3|
|9||Distant Feelings||ハルカナオモイ||Haruka na Omoi||November 29, 2010||Nao 4|
|10||As for a Bird's Faked Cry||トリノソラネハ)||Tori no Sorane wa||December 6, 2010||Sora 3|
|11||The Uncertain Pair||ソラメクフタリ||Sorameku Futari||December 13, 2010||Sora 4|
|12||To the Distant Sky||ハルカナソラヘ||Haruka na Sora e||December 20, 2010||Sora 5|
The naming of the story arcs is generally done on the basis of which girl that Haruka pursues romantically. The arcs are:
The first episode is shared in all arcs. The 2nd episode is shared by the first pair of arcs, and the 7th episode is shared by the second pair. Episodes 3-4, 5-6, 8-9 and 10-12 are episodes unique to a specific arc and not shared amongst others. The first 3 arcs are 4 episodes long, and the final is 5 episodes.
2/7 is the first divergence point. After that, 3/5 and 8/10 are the 2nd branching.