Garo Gaiden: Tōgen no Fue

Plot

Long ago, a fallen Makai Priestess named Higari became too powerful and after tampering with powers no one should wield, she had to be stopped and was eventually sealed away by another Makai Priest named Sougen. Using his body and his own life, he created the Tougen Flute and sealed Higari shortly after his death. However, through a special ritual, those who seek Higari's power can resurrect her by replaying eight notes on the Tougen Flute to undo Sougen's seal. In the present, while Kouga Saejima has travelled to the Promised Land, two fallen priests will attempt to return Higari.

Agi and Magi are Makai Priestesses and lovers. Magi is suffering from an unspecified terminal illness and Agi swears to find a means to cure her so both of them can be together. By discovering the remains of Higari, the two summon her and use her power to sustain Magi. However, they must serve Higari. Once the two resurrect Higari, the duo are rewarded with immortality. To complete the resurrection though, they need to find a priest who can see the remains of Sougen as a flute and not a set of bones.

Eventually, Magi finds Rekka, while Agi finds Jabi; both priests are suitable candidates to return Higari. The dark duo tricks Jabi and Rekka, each telling them a partial truth of the Tougen Flute's nature and that a fallen priest seeks to use the flute for dark purposes. Through a series of misunderstandings (caused by the dark duo), Jabi and Rekka think of each other as the fallen priest. However, the two eventually figure out the truth and rejoin as allies.