HeartBeat - Season 1 Episode 12 Ah.. I told you not to open it until 100 years.
Overview: While nursing Woohyeol, Inhae and Woohyeol confirm their feelings for each other. At Kim Gwangok's request, they spend time together while taking care of Kim Minjae. Meanwhile, Doshik, who is holding hands with Ri Manhwi, begins to suspect Woohyeol of being a half-vampire. Upon realizing that Woohyeol is aiming for Inhae's blood to become human, Doshik immediately sets out to chase after Woohyeol.