Japanese title: 悠久からの追憶
Seems to be a Pixiv manga adaptation of post #1600427 (which is a doujin light novel.)
Sample of the original light novel can be read here:http://www.pixiv.net/novel/show.php?id=3186842
Series largely revolves around Aya and her relationships with Hieda no Amu and Hieda no Ashichi.
Eventually released on C86 and C87.
