Zack Is the Only One Who Can Kill Me.
After willingly shooting a dangerous drug into his arm so that they could move forward, Zack begins to grow overwhelmed by the urge to kill. But with the last traces of rationality left in his mind, he tells Rachel, "Don't let me kill you just yet..."
Aired 10/08/2018EP 6 - Zack Is the Only One Who Can Kill Me.

Angels of Death
13-year old Rachel awakens to find herself trapped in the basement of an abandoned building. Without any memories, or even a clue as to where she could be, she wanders the building, lost and dizzy. In her search, she comes across a man covered in bandages. He introduces himself as Zack and he wields a grim-reaper like sickle.
A strange bond is struck between them, strengthened by strange, crazy promises…
These two, trapped in this strange building, don't know why fate has placed them there. But they will work together desperately to find a way out…