Kim Eun-ah is a very ordinary high school girl who can be found everywhere. Perhaps, she would have lived a normal life without any problem if it weren't for such incident that happened one day. The strange incident that she witnesses one day makes her no longer ordinary. As she was about to go bed after getting so tired finishing up her homework late at night, she begins to hear a cat crying outside the window. Hence, she gets curious and opens the window only to spot a terrible scene after looking around.

A man was eating a cat. As she steps back getting shocked by the terrible sight, the man climbs up the wall and enters her room by the window to tell her something strange. She gets told to choose whether she would get eaten by him or just become his wife instead. Waking up the next day after passing out, she sees that the cat is still alive and assumes that it was all a dream. However, as she discovers that the handprints are still left on the window, it indicates her that the last night's incident was indeed real.

She appeals about what she saw to her family, but no one believes her. Her fears grow even more as she finds a strange boy waiting for her in front of her house. Although she wonders why the boy was following her as if he knew her even though she had never seen him before, she couldn't anything else than just walking faster.

Realizing that he was smiling at her in the mirror, Eun- ah runs into her class and tells the people around her that there is a strange guy outside. But what the heck? Everybody mentions him as her fiance.Even her homeroom teacher doesn't inform her about his identity but rather wonder about Eun-ah's response.

To make matters worse, Eun-ah starts seeing ghosts afterward. Eun-ah's new everyday life that is no longer ordinary commences like that. The artist's creepy drawing style that portrays the gruesome ghosts is also an interesting element. Most of all, the romance and the triangle relationship between the main characters become more intimate as the tension of the story increases. Expect a strange and exciting story.