The Divine Lake

About
The Divine Lake (神の湖, Kami no Mizumi) is a lake of pure water, above everything in Midoriyama. It is guarded by Sakura Akagawa because it holds The Eternal Cherry Blossom on the center, which is one of the keys of Midoriyama.

Everytime when the full moon comes, Sakura boils the water to mislead humans. Even if she succeeded most of the time, the heroines found out her trick in the Brightening Cherry Blossom difficulty's first stage.

Eternal Cherry Blossom
Eternal Cherry Blossom (永遠の桜, Eien no Sakura) is the cherry blossom that carries the sinful souls escaping from Hikai's Hell below it. It also influences Sakura Akagawa to turn her into her second hostile form.

The Incident of The Strange Moon
At the 3rd stage of The Incident of The Strange Moon, the heroines find out the water in the lake starts boiling, which causes them to be misled by Sakura Akagawa, who tests them before.

At the Brightening Cherry Blossom Event's first stage, Akitsuki Akimoto gets on the stage as midboss to return the heroes, but they end up at Eternal Cherry Blossom anyway. Sakura Akagawa, having her form changed by the cherry blossom, confronts and attacks the heroines with her full rage.

The Incident of The Divine Mountain
The gods fighting up in the lake is the source of the incident.

At the final stage of The Incident of The Divine Mountain, the heroines get confronted by Higanjin Ichijou, Hikai, Chigawajin and Sakagami in order. After they arrive to Eternal Cherry Blossom, Junkumosora Raijin, the god of skies, which is the actual culprit, attacks the heroine.

Chigawajin's Nightmare
On the Midoriyama route, Chigawajin gets attacked by Sakura Akagawa and her duos with Akitsuki Akimoto, Higanjin Ichijou, and Rengetsu Akiyama.