Amnesia no Hanataba o ~Parallel Story~

A secret is hidden in the holy barrier. A devastating epic nightmare is caused by a devil curse. This is the third part of the series of an evil spiritual disaster after Dawn The True Night and Cladlius' Beak.
Dark wizard Nike is searching for traces of magic between the three cities. On his way he will need to confront a holy knight and meet a mysterious girl who lost her memory.

[From vndbreview]