A Seki named Mahiru Hyuga suddenly appears with Magatsuhi, her kakashi, and she seems to be head-over-heels for Kyohei. She becomes furious when the others there tell her to leave and she uses Magatsuhi against them. Elsewhere, Kuko takes Aki to see Takeshi Hirashiro, who was responsible for releasing him from prison. Out of nowhere, Mahiru breaks into the office and realizes that Hirashiro was soliciting Aki along with her. Mahiru defeats Aki by paralyzing Kuramitsuha, and she pins Kuko down on the floor using a Taser. It is revealed that eight years previously, Kyohei and Aki, along with Mahiru who followed them, found a cave in a forest by the village. They discover a kakashi, later recognized as Amaterasu, covered in glowing green moss. Amaterasu awakens and chases them outside the cave, and the three combine their efforts to take on Amaterasu, who has the ability to control one's mind. Kyohei saves Aki and Mahiru from Amaterasu by using Kukuri's left hand to repel its attack.