Yong Junhyung and Choi Jihye

Both are one of Seoul’s top assassins. Two different people, one same secret that is being kept from the world.

Same mission: to kill each other.

And their world is never the same again.

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Choi Jihye is a 19 years old college student majoring in English literature. Her parents had been dead ever since she was 12 years old. But when she’s not busy with her school work, she’ll be hunting people across the globe with the codename 1. That’s what her company named the assassins, by numbers.

Yong Junhyung is a 20 years old college student majoring in arts. Had been an assassin since age 16 and on the world’s most wanted list ever since. Under the name Joker people will doubt that they are the same person.