HeartBeat - Season 1 Episode 13 Ah.. I told you not to open it until 100 years.
Overview: Woohyeol is unable to forgive himself for losing control due to his vampire instincts upon seeing Inhae's blood. As he suffers from the cruel fate that prevents him from being with Inhae, he decides to leave Inhae. Meanwhile, upon discovering that Woohyeol is the half-vampire he has been searching for, Doshik orders Manhwi to capture Woohyeol.