From Rose Squad Scans:

Compared to his genius older twin brother Jeong Jaeui, ex-soldier Jeong Taeui thought he was average. Thanks to his biological father cum uncle Jeong Chang-in's forceful request, he ends up working at the United Nations Human Resources Development Organization (UNHRDO) for half a year where he meets the crazy guy with pretty hands, Ilay Riegrow. As their lives become entwined, Taeui's life starts to go down a path that he never expected.

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