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

Summary

The story revolves around Mu Qing Yan and her brother Lin Xuan, a police officer with a playful and childlike nature. Their relationship is complex, with Mu Qing Yan both nurturing and protecting her brother. The narrative shifts to a mysterious supernatural case involving a strange, zombie-like figure captured on subway station surveillance footage. Lin Xuan and Liu Yan are investigating this bizarre incident, which involves a person moving in an unnaturally stiff manner, suggesting some unknown supernatural force controlling their movements.

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