Ep. 3: Kouki becomes an angel after dying to save Rin from Sayara's Higan plot on Death Island.
Twenty years after episode two, Kouki works for Rin and is married to Yuki with a son. A dying girl’s cryptic warning leads Rin to investigate the biological weapon Higan, tested on Death Island. Police officer Tamotsu Yanagihara links the island’s former residents to recent Tokyo bombings. Rin is captured and taken to the island, where she finds Sayara Yamanobe survived as an immortal using an exoskeleton. Mimi visits an unnamed informant who demands sex for information about the group Kudoru. Rin survives vivisection but is killed again while fleeing. Sayara plans to exterminate humans with Higan. Kouki arrives by helicopter to rescue Rin but is fatally shot. He consumes Shogo’s time fruit, becoming an angel to carry Rin to safety. He then attacks Sayara, but Apos removes their time fruits, killing them instantly. The next day, Rin and Mimi remain shaken in their office.
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.