Touhou: Gensokyo Past Days

The Hakurei Border is finally starting to wear out after centuries of standing. But no one, not even the protectors of the border themselves, know how to repair it; maybe except for one gap youkai. But, the problem is, said youkai has been missing for over 2000 years and not a living person in Gensokyo know where she may be. What to do now? Fortunately, thanks to the efforts of a certain charismatic vampire and the information from a gluttonous ghost mistress, the newly recruited heroes are sent out on a journey to find the youkai and save their beloved world. And where will they start, you ask? Well, none other than in the time when said youkai was last seen: the Era of the Great Games.