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 Saezima has travelled to the promised land (Garo: Soukoku no Maryu), two fallen priests,Jabi and Rekka, will attempt to return Higari.

It is not Tag. It is not Battle Royale. It is Battle Royale Tag. Sena walks up to the school rooftop to return Yudachi's handkerchief. Yudachi is not there and Sena falls asleep waiting. It is dark, she is confined and locked up at her school when Sena wakes up. The school has turned bloody red and the girls have to fight to the death. Who will survive the carnage is up to the girls.

A live-action theatrical film for Hakuoki SSL, a spin-off of the popular Hakuoki otome game series that re-imagines the cast of Shinsengumi samurai warriors as teachers and students living a peaceful existence in modern Japan.