Decision
Elen and Reiji resume their "normal lives" as students once more until Cal takes a personal visit to Mio. Telling her to ride with her, Cal meets up with Lizzie. However, she points her pistol at Cal and tells her to get away from Mio. After taunting Lizzie on whether she would really shoot her after taking out the pocket watch given to Cal by Reiji years ago when he held the codename Phantom by Inferno, Cal takes aim and shoots at Lizzie before driving away and leaving her to die. Reiji receives a phone message with threats from Cal. Meanwhile, Shiga visits Scythe and angrily yells at him for having dragged Mio into this mess after seeing the corpses of his men at the Mio residence. Scythe assures Shiga that he would take care of Cal himself, informing him that he had summoned reinforcements to take care of the problem.
Aired 04/09/2009EP 23 - Decision

Phantom: Requiem for the Phantom
A young man wakes up in a strange room with no memory of who he is or how he got there. His past is lost—and his future belongs to Inferno, a violent crime syndicate. They give him a new name—Zwei—and team him with their top assassin, the enigmatic Ein. She’ll teach Zwei all he needs to know about his new life as an Inferno operative, starting with lesson number one: kill or be killed.
(Source: Crunchyroll)