Ep. 11: Yuki and Takuya enter Lost while Taiyou confronts Daichi's digital form.
Yuki and Takuya travel on a motorbike to the Lost area, spotting Suzuna from the Lacuna Chemical Laboratory with police. They suspect she and Taiyou plan to enter Lost. Meanwhile, Yumiko and Kouta monitor a Lacuna antenna for Eiji to hack, which maintains sanity in Lost. Yuuji and Keigo help Kouta and Yumiko bypass guards. Takuya and Yuki receive communication devices from the Phantom Thief Brigade and Yoshiaki. They find a dying Suzuna, who regrets tormenting Yuki. Kana helps Geek hack the antenna, allowing entry. Yuki faces doubts from Yua and Ryouko, but Yumiko reassures her. Takuya struggles with regrets as contact with Eiji is lost. Taiyou reaches the lowest point of Lost to delete Daichi, whose personality is in computers. Yuki and Takuya regain focus through shared memories and arrive where Taiyou attacks Daichi. Yuki summons Akira to intervene.
Episodes
- Ep. 7 · Takuya investigates Light of Hope Academy while uncovering past regrets and Lacuna Chemical connections.
- Ep. 8 · Yoshiaki's TV Trick Targets Lacuna Lab While Souma's Condition Worsens
- Ep. 9 · Daichi presents parallel universe theory while facing police inquiry about ancient remains and DNA anomalies.
- Ep. 10 · Yuki and Takuya resolve to enter the Lost despite Taiyou's lethal warnings and Tsuki's failed experiment.
- Ep. 11 · Yuki and Takuya enter Lost while Taiyou confronts Daichi's digital form.
- Ep. 12 · Yuki and Takuya defeat Taiyou with a bullet shard and escape Lost before reuniting later.