Tune In to the Midnight Heart (2026) : 1x7

Arisu discusses Rikka's cover-song choices with her friend Aiko, learning of Rikka's fear of judgment for her originals, and arranges a private club concert to boost her confidence. Impressed by her passionate performance, the group bonds further during a mall outing and karaoke session. Noticing familiar traits linking the girls to Apollo, Arisu questions them about a shared song, but their confusion leaves the mystery unresolved.