Ep. 4: Teruki witnesses Ruon's murder and faces cyborg attacks while uncovering AI origins.

Teruki meets Ruon in virtual reality, then sees her murdered in reality. He visits Asougi Consulting, where Mimi reveals Ruon is an AI based on Katsuyuki Kamiyama’s deceased daughter. During a walk, cyborg Laura attacks Rin, who regenerates and explains time fruits. Mimi and Tamotsu link Ruon to Project L'Isle-Adam. After Kamiyama attacks, commandos force the group to flee. Mimi mentions The Future Eve. Military forces capture Teruki. Rin and Mimi realize the real-world Ruon was an android. Tamotsu is shot by a sniper while providing Teruki’s flight details. Rin boards the plane, finding Kamiyama dead. Ruon manipulated the military to reach Teruki. Rin pushes Teruki to safety with a parachute. She fights Ruon, and both fall into the jet engine. Later, Mimi visits Tamotsu’s grave. Rin’s fate remains unknown.
Episodes
- Ep. 1 · Rin survives death and partners with Kouki after infiltrating Aoyama Pharmaceutical labs.
- Ep. 2 · Rin investigates a stamp theft while Kouki seeks an angel linked to Yuki's missing brother.
- Ep. 3 · Kouki becomes an angel after dying to save Rin from Sayara's Higan plot on Death Island.
- Ep. 4 · Teruki witnesses Ruon's murder and faces cyborg attacks while uncovering AI origins.
- Ep. 5 · Thirty years later, amnesiac Rin hunts immortals while her daughter Mishio uncovers the truth.
- Ep. 6 · Rin escapes Apos and becomes Yggdrasil's Guardian after consuming Kouki's time fruit.