The truth behind the fangs (septiplier)

Jack was walking through the park at midnight when he gets attacked by people in black suits. he gets jabbed with a syringe and then they left like nothing happened. when he gets back home he starts acting strange round his roommate Mark which gets Mark a bit worried. Jack realized that he can't go into the sun otherwise he burns, Mark gets a lot more worried as Jack starts craving blood and hisses at Mark. then Mark tries to follow Jack one night and realizes that his best friend had become a vampire and what makes matters worse is that the same people in black suits get Mark and change him into a demon. Jack sees this and attacks them and after they flee he goes to his roommate and fears the worse.