第 20 集: 重音穿越時空前往過去，試圖帶回若菜並阻止Kunad Gate的災難。

The woman from the hologram is Wakana, a scientist who defected from Togetsu because of their unethical experiments and went to Suoh for protection. Yuito and Kasane, however, recognize that the woman standing before them is not really Wakana, but an image created by BABE in order to stop them. As the platoons push forward, BABE deliberately shuts itself down, preventing them from gaining any useful information on how to stop the Kunad Gate. Luka suggests that Yuito and Kasane use the red strings in order to travel to the past, to the day where Wakana died at the hands of Others, in order to bring her to present and, hopefully, find another solution. Kasane volunteers to go alone, as it would be too risky for Yuito's past and present selves to meet each other. The attempt to open a portal to the past is successful and Kasane finds Wakana, who was already expecting her, due to BABE having transmitted information from the present to the past. Unfortunately, she confirms that only Yuito's death can stop the Kunad Gate but before she departs with Kasane, she asks her to give Yuito the ear cuff he presently wears. Kasane does so and, in the present, Yuito remembers that it was Kasane who saved his life. After saving Wakana from a Togetsu assassin, Kasane successfully brings Wakana to the present, where they are reunited with Yuito. (Source: Wikipedia)

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