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Senior Year

Episode number: 1

Overview: Ordinary high school student Bong-seok hides a secret.

Booyang: Family Support, Levitation

Episode number: 2

Overview: Mi-hyun hides Bong-seok's superpowers, but the mysterious incidents on social media make her anxious.

1+1

Episode number: 3

Overview: The closer Bong-seok grows to Hui-soo, the more risk of exposure he draws

The Secret

Episode number: 4

Overview: Bong-seok's secret is exposed and Hui-soo walks him home. Frank searches for his third target.

Recall

Episode number: 5

Overview: Hui-soo assures Bong-seok that his secret is safe by revealing her own secret.

Bungaeman

Episode number: 6

Overview: Jeon Gye-do's past is revealed. The NIS finds out information about Frank.

The Stranger

Episode number: 7

Overview: Frank recalls his past as he eliminates his targets. After Frank's visit, Mi-hyun suppresses her son.

Black

Episode number: 8

Overview: In 1994, Mi-hyun is ordered by Deputy Director Min Yong-jun to get close to and learn about the thought process of black ops agent Kim Doo-sik.

Humanists

Episode number: 9

Overview: Doo-sik and Mi-hyun grow closer, and Doo-sik suggests that they deceive Min Yong-jun.

The Monster

Episode number: 10

Overview: Ju-won, who leads his gang with his monstrous abilities, is betrayed and becomes a fugitive.

Romanticist

Episode number: 11

Overview: Ji-hee gradually opens up to Ju-won.

Partners

Episode number: 12

Overview: Doo-sik shows up at Mi-hyun's apartment with a plan to escape Deputy Director Min for good.

Jang Ju-won

Episode number: 13

Overview: After the Black Team disbands, Ju-won is offered a mission by Deputy Director Min to revive the team.

The Idiot

Episode number: 14

Overview: Jae-man tries to save his wife with his strength and Ju-won is sent in to subdue him.

N.T.D.P.

Episode number: 15

Overview: Mi-hyun and Ju-won watch the auditorium video and head to Jeongwon High, while Gye-do discovers Jun-hwa.

The Man Between

Episode number: 16

Overview: With Mi-hyun's question, Il-hwan reminisces about his past.

Awakening

Episode number: 17

Overview: Jun-hwa attacks Hui-soo, and Bong-seok awakens his powers to save her.

South and North

Episode number: 18

Overview: Mi-hyun asks Deok-yoon where Doo-sik is, and he tells her what happened in the North.

Final Battle

Episode number: 19

Overview: The fight takes a new turn with the appearance of a new North Korean superbeing, Jae-seok.

Graduation Day

Episode number: 20

Overview: Parents and children fight to protect each other. Will this repeated war ever end?