I don’t know how it is in the manga, but in the anime this paragraph from the excerpt of Episode 2 is wrong:
“The woman attempts to escape but Maeda stops her and uses her blood to turn the injured Moriyama successfully into a vampire.”
What truly happens is:
“The woman attempts to escape and in doing so bites and drinks from Moriyama, infecting him. After Maeda kills her, the man also mercy kills Moriyama, either because he doesn’t want him to die slowly and painfully due to a rejection of the bite, or because he doesn’t want his colleague to be trapped in a Vampire’s life, forever kept hidden from his parents, newly wed wife and the life and the children they could have had.”