Bad Memory Eraser - Season 1

For fifteen years, Lee Kun lived as his younger brother's shadow. Then, he met Joo-yeon, a psychiatrist who changed his life.

Kun successfully erases his bad memories through surgery and lives a new life. He immediately meets Joo-yeon, whom he thought was his first love. Joo-yeon hides the side effects of the surgery.

Joo-yeon confronts Kun. Lee Shin keeps Kun's accident a secret. He is attracted to Joo-yeon after the consultation. Sae-yan appears.

In order to get a contract with Si-on, Kun picks up a tennis racket again. Joo-yeon sneaks into Kun's house to look for her swapped documents.

Joo-yeon is also present when Kun meets with investors. Joo-yeon also finds out about the relationship between Dr. Teo and Dr. Yeo.

Lee Kun rejects Joo-yeon who wants to work as a team doctor at his agency. Joo-yeon offers Kun a deal.

Sae-yan returns to Korea to find someone. However, Shin has a fight with Sae-yan and returns to Seoul alone. Joo-yeon and Kun pick up Sae-yan.

Sae-yan who becomes a translator for foreign coaches. Lee Shin finds out that Joo-yeon is not Lee Kun's first love. They work together to lie to Kun.

Shin and Joo-yeon almost get caught by Kun. Si-on runs away from the filming location. Kun loses to Chairman Hong in the fight for investment.

The national tennis athlete training day has begun. Sae-yan, who is being chased by his family's men, runs away with Kun, Shin, and Joo-yeon.

Joo-yeon and Kun stay at Kun's grandmother's house. Kun manages to stop Sae-yan's mother, who comes to take Sae-yan away.

Joo-yeon and Shin save Kun who fell into the water. Joo-yeon finds Kun's diary. Shin secretly burns Kun's emotional diary.

Lee Shin's attempted murder is revealed on the internet. Kun gets the black box video that recorded the incident and learns the truth.

Teo succeeds in the 109 mouse reset experiment and becomes the leader of the research center. In order to find Sae-yan's biological father, Kun and Sae-yan look for old newspapers.

Ju-yeon faces a life-threatening crisis after confronting Sae-yan's biological father.

Goon appears as a witness at the ethics committee hearing. Goon and Shin receive a photo of Shin's stalker and learn that the stalker is Sae Yan's biological father.