Beauty and Mr. Romantic - Season 1 Episode 18
Overview: Pil Seung is confused after he sees Ji Young's tattoo on her ankle, which looks exactly like the one Do Ra had. He travels to her hometown to talk to her grandmother and finds out she had amnesia. Meanwhile, Ma Ri visits Sun Young's place to see Pil Seung again, and Do Jun realizes he used to live with them when he was young.