Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

Lin Xuan is approached by Special Forces representative Zhou Lie to help investigate gene weapons. Initially hesitant, Lin Xuan learns about the unique structure of special agents, which includes "unofficial formal personnel" who maintain their regular careers but can be called to serve when needed. Zhou Lie explains that if Lin Xuan refuses this opportunity, he'll permanently lose connection with the Special Forces. Despite his reservations about the demanding nature of the work and his responsibilities to his sisters, Lin Xuan seems intrigued by the potential role.

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