Two years have passed since the camping incident and the relationship between the friends has changed dramatically.

Many years have passed; Saki and Satoru have grown and moved their separate ways. But recent actions within the monster rat community have brought them back together.

Many events act as catalysts in an impending war.

As Niimi stays behind to fulfill Tomiko’s last order, Saki and Sataru head toward the Temple of Purification. When they get there they learn the true extent of Yakomaru’s true plan.