Merciless

Briefly about Merciless manga: 

Do Janggon is a special forces spy used against North Korea who is also a human weapon. He was apprehended and taken to the “Daesan Welfare Center,” which violates human rights and engages in labor exploitation, after both of his arms became wounded.

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He would need a month to fully recuperate, the doctor predicted. He must therefore wait it out in the welfare center till his arms are fully recovered.