Heartbeat (2023) (2023)

S1E4 Episode 4

The sight of blood on In-hae's lip sparks a memory for Woo-hyeol, bringing Hae-sun to mind. He starts to question whether In-hae could be Hae-sun's reincarnation. Meanwhile, In-hae is troubled by her first kiss with Woo-hyeol and feels uneasy around him, especially since he works as a janitor at her school. Yang-nam informs Woo-hyeol that if he drinks In-hae's blood, which is infused with love, he might have a chance to become human.