Setsu Getsu Yawa

"Saniwa"—those who discern the truth of a god during a divine summoning ritual.

Mizuchi Seishirou had been training relentlessly to become a Saniwa.
But then, news reached him: Kamikura Mao, the daughter of Kuki Shrine, had failed a divine summoning ritual and was acting strangely.

Rushing back to his hometown, he found Mao—her speech and behavior regressed to that of a child.
If she wasn’t awakened within five days, her body would perish…
There was only one way to save her: the Secret Rite of the Saniwa.
He couldn’t lose her—his childhood friend, his precious little sister… Mao.
Holding onto the promise they made as children, Seishirou set up a barrier in the inner sanctum of Kuki Shrine and secluded himself with Mao.

Within the prison of emotions that had eroded both humans and gods for centuries—
The intimate bond between Seishirou and Mao was about to begin.