Season 1

Do Hyun realizes he has another side within him and recognizes that this is multiple personalities.

Even though Ri Jin is flustered by Do Hyun's complete change into Se Gi, Ri Jin rushes him to the hospital.

Perry Park rushes to the scene and saves the damsel in distress from Ahn Gook. Together, they flee the scene.

Do Hyun's new personality emerges, and he's amazed that it's a young child.

Remember what happened on that day. Se Gi, after capturing Ri Jin, asks her to put Do Hyun to sleep forever.

Do Hyun can't stop thinking of Ri Jin. Se Gi gets so jealous that he warns Do Hyun to stay away from Ri Jin.

Tae Im asks Chief Ahn why Do Hyun returned to Korea and Chief Ahn is left in a quandary.

Ki Joon proposes to Chae Yeon, but she's angered by his manner. Ri Jin agreed to be Do Hyun's secret doctor.

My third mistake was my destiny. Ri Jin meets all of Do Hyun's personalities in one night.

Se Gi declares total war on Do Hyun and Jeon Myun while Ri Jin remains at the mercy of Se Gi.

Tae Im is shocked by seeing the video footage from Joon Pyo's hospital room and subsequently faints.

Do Hyun learns later what Se Gi has done and falls into despair. Chae Yeon is all the more shaken by Do Hyun.

Yo Na, Do Hyun's other personality, comes out and kisses Ri On on his cheek. Do Hyun finds Seo Yeon's photo.

I'll find out what happened! Do Hyun spends a merry night with Ri Jin's family and regains his spirits.

Do Hyun begins recalling his lost memory and Ri On decides to look into who masterminded Ri Jin's kidnapping.

I'll remember for a really long time. Do Hyun goes on a trip with Ri Jin on the winter train.

Do Hyun and Ri Jin falls in shock as they remember the past. And Do Hyun learns about the fire accident.

Let's run away from the terrifying memory. Ki Joon begins to collect all kinds of information about Do Hyun.

Ki Joon and Chae Yeon are surprised to learn that Do Hyun has multiple personality disorder.

The hidden personality of Mr. X, along with Na Na, reflects Do Hyun's healing process.