Hifuu Club Activity Record ~The Sealed Esoteric History~ (chinese: 秘封活动记录 ~The Sealed Esoteric History~) is an animation project developed by chinese circle Kyoto Fantasy Troupe.
It revolves around the many events in the lives of Maribel Hearn and Renko Usami, and it's presumed it will also feature details on the backstories of other Touhou characters and Gensokyo itself.
The first instalment of the series is set to be released by mid-November 2014, and will serve as a prologue of the series, rather than an actual episode.
Episodes
Cover for the prologue of ~The Sealed Esoteric History~
Prologue
On October 2nd, 2014; Kyoto Fantasy Troupe revealed the first teaser for their first animated episode, which will serve as a prologue for the series.
It is known it will feature Maribel Hearn and Renko Usami as the main characters. However, the teaser briefly shows animated motions of other characters like: Remilia Scarlet, Yukari Yakumo, Kanako Yasaka, Suwako Moriya, and Reisen Udongein Inaba.
It also shows the creators' own rendition of living Yuyuko Saigyouji and (possibly) a vengeful phantom Minamitsu Murasa; which is why it's assumed the series will also center in less-common characters' backstories.