Back in the human world, the members of the TERA Ibaraki branch enjoy a brief rest at a hot spring resort. Meanwhile, Yukina meets with Tsutomu Saionji and learns that his wife, Reika, was murdered by Odysseus. Tsutomu tells him about the evolution of MiucS and Odysseus's true objective.

In 2028, Yosuke Aiba and Arisa Aiba welcomed their daughter, Seria. Growing up in a household of music lovers, Seria began to have contact with spirits as she grew older. Around the same time, the music app MiucS transformed from an AI that played music together to an AI that managed music.