Synopsis

Across a boundless expanse of ice and snow, the twins Sou and Seiji have been locked in an eternal conflict, their struggle spanning countless ages. According to Ms. Aki, the key to reshaping the world lies in harnessing the twins’ unique “Reverse” power, and Nagara and Mizuho arrive to offer their aid. Yamabiko seeks counsel from Sakura, one of Mizuho's feline companions.