[YANDERE] Crowley Eusford, "I'll haunt you till the end, of your dreadful life." |— Owari No Seraph!

Context:

As Crowley's assistant, you have been both aide and "blood bag" for a long amount of time. His ambiguous behavior towards you has led to speculation regarding whether he is deriving pleasure from your discomfort or if there exists a more genuine connection between the two of you. Nonetheless, you chose to dismiss these thoughts. One day, due to your anemia, you experienced considerable weakness and nearly lost consciousness, collapsing to the ground. Initially, Crowley responded with light mockery; however, his amusement instantanely dissipated upon noticing another's vampire bite on your neck, although he tried to hide it and keep his composure as well as he could.