Season 1
Goo Seo-jin is a third-generation chaebol who runs the theme park Wonder Land. He seemingly has everything — looks, brains, and fortune. But a traumatic incident in his childhood resulted in Seo-jin having a split personality — one is a cold, ruthless man, while the other is the polar opposite, someone kind and gentle. Because of this, he vows never to date or marry. Seo-jin wants to get rid of the circus show at Wonder Land due to low ticket sales and high overhead costs, but he butts heads with circus master Jang Ha-na. Ha-na insists on saving the failing circus and dreams of revamping it back to its former glory. She soon finds herself falling for both of Seo-jin's personalities.
Episodes
Episode 1
Ha-na, a leader of a circus, pleads to Goo Seo-jin, the director of Wonderland, not to disband the crew.
Episode 2
Upon discovering he saved Ha-na, Seo-jin thinks Robin has returned. Meanwhile, Ha-na gets short-term amnesia.
Episode 3
Ha-na is confused by Seo-jin, who looks just like Robin. Meanwhile, Robin realizes Ha-na brought him out.
Episode 4
Seo-jin terminates the contract with Ha-na, afraid she will make Robin return. Ha-na demands to know why.
Episode 5
After a fight, Seo-jin and Robin compromise to stay as Robin at night and Seo-jin during the day.
Episode 6
Ha-na confesses her feelings, leaving Seo-jin in shock. Upon hearing she's in danger, Seo-jin looks for her.
Episode 7
Seo-jin's dad tells Seo-jin to end the circus contract since Robin and Ha-na are in love, but Seo-jin says no.
Episode 8
Seo-jin falls ill and blames Ha-na for making him suffer from anxiety. Meanwhile, Robin offers Seo-jin help.
Episode 9
Ha-na thinks Seo-jin is Robin's twin. Mr. Min gets worried and advises Robin to tell her the truth.
Episode 10
Chairman Goo, Seo-jin's dad, tries to send Seo-jin abroad. Meanwhile, Tae-joo threatens to kill Dr. Kang.
Episode 11
Seo-jin shows Ha-na that Robin is his other self and says they have a condition called DID.
Episode 12
Tae-joo watches Seo-jin's video. Also, Seo-jin tells Ha-na he will take loving Robin to mean loving him too.
Episode 13
Robin tells Seo-jin to suspect those around him. Tae-joo is flustered as he sees Seo-jin sharing his memory.
Episode 14
Seo-jin tells Tae-joo that his dad helped the kidnapper, but he distrusts him. Meanwhile, Ha-na falls ill.
Episode 15
Tae-joo says Seo-jin lied about his father to survive, but Seo-jin says he'll bet everything that it's true.
Episode 16
Robin asks Ha-na to build a new workshop together. Meanwhile, Seo-jin comes to the circus crew's office.
Episode 17
Ha-na gets trapped by reporters at Robin's. Seo-jin tries to tell them he has a DID, but Ha-na stops him.
Episode 18
Seo-jin thanks Ha-na for allowing Robin to exist, and news articles about him and Robin help Wonderland.
Episode 19
Robin notices his memory loss. Seo-jin gains some of Robin's memories and worries about what to tell Ha-na.
Episode 20
Robin and Ha-na get married, but Robin finds it hard to draw Ha-na as well as he did and realizes it's time.