Practice
After more training with Ein, Zwei is going to be tested. He has to kill a man named Captain Wallace of the Navy SEALs, who sold weapons to Inferno, but because they weren't his only costumers and he sold many weapons to terrorists. Wallace eventually sullied the name of Inferno and put them in danger of being suspected by the FBI after an FBI agent was found dead in Mexico, forcing him to beat Zwei and defeat him in a duel to the death in order to allow Inferno in rebuilding his life all over again. After hesitation of killing Wallace and almost being killed by him, his assassination skills awake and he shoots Wallace in his head after wounding him by using a combat knife to stab him in Wallace's right arm.
Aired 17/04/2009EP 3 - Practice
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)