HeartBeat - Season 1 Episode 8 Ah.. I told you not to open it until 100 years.
Overview: Woohyeol and Inhae are forced to leave the mansion due to construction. Now that they are apart, they strangely think of each other more. However, Woohyeol starts experiencing physical symptoms and hears from Cat Man that if he doesn't consume Inhae's blood, filled with love, he will die from it soon.