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With only one day left in his 100-year goal, he fails to become a human being. He is even bitten by a woman, In-hae, causing him to faint. Yang-nam advises him to keep her by his side and watch her over, as she doesnt seem to be an ordinary person. Meanwhile, In-hae encounters a real estate scammer and gets involved in a chase to catch the fraudster, but finds herself in danger...

The blood on Inhaes lip triggers a memory in Woohyeol, reminding him of Yoon Haeseon. Woohyeol wonders if Inhae is the reincarnation of Haeseon. Inhae is concerned about her first kiss with Woohyeol and feels more uncomfortable seeing him, who is employed as a janitor at the school she works at. Cat Man tells Woohyeol that if he drinks Inhaes blood, filled with love, he can become human.

Inhae struggles to find a new job. Shin Doshik suggests Inhae start a guesthouse using her mansion. Although Woohyeol strongly opposes the idea at first, he eventually agrees because there is no other way for Inhae and Doshik to become closer. As Woohyeol realizes Doshiks affection for Inhae, he feels a pang of jealousy. Meanwhile, someone whom Woohyeol has longed for appears before him.

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 doesnt consume Inhaes blood, filled with love, he will die from it soon.

Inhae cannot understand Woohyeol, who says he needs to have her blood filled with love. Woohyeol proposes a deal where, if Inhae provided him with her blood, he would leave the house. Meanwhile, Haewon asks Inhae to throw a party to get closer to Woohyeol. Everything seems to go smoothly, but Inhae cannot shake off a sense of unease.

While nursing Woohyeol, Inhae and Woohyeol confirm their feelings for each other. At Kim Gwangoks 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 Inhaes blood to become human, Doshik immediately sets out to chase after Woohyeol.

Inhaes long-awaited father makes a return, but her emotional wounds make it difficult for her to accept him. Meanwhile, Woohyeols health continues to deteriorate, deeply saddening Sanghae and Dongseop as they realize that time is running out for him. Meanwhile, as Manhwi fails to capture Woohyeol, Doshik takes matters into his own hands.

As Woohyeol accepts the fact that theres not much time left for him, he decides to spend the remaining time with Inhae. Doshik, upon finding out that Woohyeol is getting close to death, also becomes anxious. Will Woohyeol and Inhae be able to hold onto their love until the end?