Episode Title:
Earth Invasion (Chapter: Atonement, Part 4).
Episode Description:
Rena learns that Mion took the packages from where they originally hid, making her lose faith in her friends and causing her sanity to slip. Keiichi tries to stop Rena but she confronts him with the dark secret. He confesses his past sin with paranoia in the first event to the girls. It is revealed that Mion uses a marker instead of the syringe. Rika reacts thunderstruck and later tells Keiichi no one else remembers his murder except her, and she forgives him. This strengthens his understanding of Rena's situation and he resolves to prevent such tragedies from occurring again. He apologizes to Mion, who is uncomfortable and baffled by it.
