The third installment of studio Ocelot's Polyphonica Crimson series, releasing as an all-ages kinetic novel. The story is set between game episodes 3&4, and the light novels.

A cave-in at a certain ruins resulted in the complete loss of the excavation party affiliated with Maynard University. It happened when they took out ‘something’ from the sarcophagus deep inside. Afterwards, two young girls who were actually founder spirits, Richelie and Esther, visited Phoron and Corticarte and warned them that the spirit-eating ‘harvester’ has awakened. [From [url=http://omochikaeri.wordpress.com/2013/05/25/may-2013-eroge-releases/]Hau~ Omochikaeri![/url]]