Zakuro breaks one of the seals on the Seven Pillars that connect the human and spirit world and protect the town. Zakuro is taking control of Rin and using her to attack Touka's brother Kyousuke with those necromancer abilities of hers.

The Quartet is trying to free Rin from the control of Zakuro.

Rin is finally breaking free of Zakuro's control, and Hime is going to fulfill those mayor shoes of hers to protect her townspeople.

Bonus short included on BD/DVD Vol. 4

Bonus short included on BD/DVD Vol. 5

Bonus short included on BD/DVD Vol. 6